DISABLED Wireless Network controller: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe not working anymore on MSI CR620 Laptop in Ubuntu 11.10

Hy everyone .

        I had problems with wireless before so I've installed the latest version of ubuntu . It worked great for almoust a week and now it's just not working , It appears that "Wireless networks device not ready " .
        On windows I have a lot of available networks but on Ubuntu it doesn't finds them anymore even that it was working a few days ago .
I have a MSI CR620 Laptop .
I hope that someone can help me . Thanks in advance .

Here is some in formation that may be usefulll :

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric

uname -a

Linux ubuntu 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 20:45:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

lspci

00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05)
00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
05:00.0 Network controller: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

sudo lshw -C network

[sudo] password for igs:
  *-network DISABLED
       description: Wireless interface
       product: RT3090 Wireless 802.11n 1T/1R PCIe
       vendor: Ralink corp.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: wlan0
       version: 00
       serial: 6c:62:6d:1f:be:eb
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rt2800pci driverversion=3.0.0-17-generic firmware=0.34 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
       resources: irq:19 memory:f4000000-f400ffff
  *-network
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:06:00.0
       logical name: eth0
       version: 02
       serial: 6c:62:6d:2e:bf:24
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:40 ioport:a000(size=256) memory:f2c10000-f2c10fff memory:f2c00000-f2c0ffff

iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:off/any
          Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm
          Retry long limit:7 RTS thr:off Fragment thr:off
          Power Management:on

sudo lsmod

Module Size Used by
rfcomm 47946 0
bnep 18436 2
bluetooth 166112 10 rfcomm,bnep
parport_pc 36962 0
ppdev 17113 0
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
joydev 17693 0
binfmt_misc 17540 1
snd_hda_codec_hdmi 32040 1
snd_hda_codec_realtek 330815 1
snd_hda_intel 33390 2
snd_hda_codec 104931 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13668 1 snd_hda_codec
snd_pcm 96714 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi 13324 0
snd_rawmidi 30547 1 snd_seq_midi
snd_seq_midi_event 14899 1 snd_seq_midi
snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29991 2 snd_pcm,snd_seq
usbhid 47198 0
snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
hid 95463 1 usbhid
uvcvideo 72711 0
videodev 92992 1 uvcvideo
v4l2_compat_ioctl32 17083 1 videodev
msi_laptop 15055 0
sparse_keymap 13890 1 msi_laptop
snd 68266 14 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
arc4 12529 2
rt2800pci 18715 0
rt2800lib 54538 1 rt2800pci
crc_ccitt 12667 1 rt2800lib
rt2x00pci 14578 1 rt2800pci
rt2x00lib 50365 3 rt2800pci,rt2800lib,rt2x00pci
psmouse 73882 0
mac80211 462046 3 rt2800lib,rt2x00pci,rt2x00lib
serio_raw 13166 0
i915 571251 3
cfg80211 199630 2 rt2x00lib,mac80211
soundcore 12680 1 snd
eeprom_93cx6 12725 1 rt2800pci
intel_ips 18089 0
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
wmi 19256 0
mei 41480 0
drm_kms_helper 42558 1 i915
drm 236290 4 i915,drm_kms_helper
i2c_algo_bit 13423 1 i915
video 19412 1 i915
ahci 26002 2
libahci 26861 1 ahci
r8169 52788 0

nm-tool

NetworkManager Tool

State: disconnected

- Device: wlan0 ----------------------------------------------------------------
  Type: 802.11 WiFi
  Driver: rt2800pci
  State: unavailable
  Default: no
  HW Address: 6C:62:6D:1F:BE:EB

  Capabilities:

  Wireless Properties
    WEP Encryption: yes
    WPA Encryption: yes
    WPA2 Encryption: yes

  Wireless Access Points

- Device: eth0 -----------------------------------------------------------------
  Type: Wired
  Driver: r8169
  State: unavailable
  Default: no
  HW Address: 6C:62:6D:2E:BF:24

  Capabilities:
    Carrier Detect: yes
    Speed: 10 Mb/s

  Wired Properties
    Carrier: off

sudo iwlist scan

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Network is down