Wireless Not working in ubuntu 10.04 . My Wireless card is 03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [8086:0082] (rev 34)

My wiress card Intel Corporation Centrino Advanced-N 6205 does not work under Ubuntu 10.04 LTS.
My laptop make is Acer Aspire 5750-6872 . It seems is proper driver is not loaded for the same. Searching around the net suggest that iwlwifi driver should work for this wireless Device. Also this driver is present in my kernel but I guess it is not loading by default . Please help . I love ubuntu but no use without wireless card working.

root@me-laptop:/lib/modules/2.6.32-40-generic-pae/kernel/drivers/net/wireless/iwlwifi# ls -al
total 428
drwxr-xr-x 2 root root 4096 2012-03-24 19:14 .
drwxr-xr-x 18 root root 4096 2012-03-24 19:14 ..
-rw-r--r-- 1 root root 110440 2012-03-06 06:26 iwl3945.ko
-rw-r--r-- 1 root root 170824 2012-03-06 06:26 iwlagn.ko
-rw-r--r-- 1 root root 144960 2012-03-06 06:26 iwlcore.ko

root@yagnesh-laptop:~# lspci -nnvvk
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [8086:0082] (rev 34)
 Subsystem: Intel Corporation Device [8086:1301]
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 7
 Region 0: Memory at c0500000 (64-bit, non-prefetchable) [size=8K]
 Capabilities: [c8] Power Management version 3
  Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
  Address: 0000000000000000 Data: 0000
 Capabilities: [e0] Express (v1) Endpoint, MSI 00
  DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
   ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
  DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
   RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
   MaxPayload 128 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend-
  LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <32us
   ClockPM+ Suprise- LLActRep- BwNot-
  LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
   ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
 Capabilities: [100] Advanced Error Reporting <?>
 Capabilities: [140] Device Serial Number ac-90-b0-ff-ff-96-11-08