Problem to enable my net connection...

What is your network card?
Do you connect with a username and password (as opposed to ADSL "always-on" connection)?

ya i connect with a username and password(in windows)...
great responce is so fast.....

Im sorry, i know very little about computers and i dont know any thing about my network card... and i found this

https://answers.launchpad.net/ubuntu/+source/gnome-panel/+question/1309

it resembles very much like the problem what i have ....
ill try that and let you know my status....
Thanks ya...
thanks ClovisFabricio....

Could you please run Applications/Accessories/Terminal and type the command below and paste the output here.

ifconfig

if you connect with username and password, you must open a terminal (under Applications/Accessories/Terminal) and type:

sudo pppoeconf

And then press enter, it will ask for the password, enter it, and press enter.
It will then ask things, just keep reading, and if you dont understand just answer the default option (just press enter).

It will ask for the username and password, enter them as in windows.

If all run fine, at the end it will ask if you want your connection to start automatically at boot, that is a good idea, so answer [yes].

Pay attention: If there is an error anytime or something reply with what happened, and which step you were.

Jim Qode this is the result that i got after typing ifconfig

eth0 Link encap:Ethernet HWaddr 00:11:5B:3F:B7:DD
          inet6 addr: fe80::211:5bff:fe3f:b7dd/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:21658 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16422 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:31209421 (29.7 MiB) TX bytes:1645313 (1.5 MiB)
          Interrupt:20 Base address:0xc000

eth0:avah Link encap:Ethernet HWaddr 00:11:5B:3F:B7:DD
          inet addr:169.254.8.178 Bcast:169.254.255.255 Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          Interrupt:20 Base address:0xc000

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:3874 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3874 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:310412 (303.1 KiB) TX bytes:310412 (303.1 KiB)

ppp0 Link encap:Point-to-Point Protocol
          inet addr:59.92.113.218 P-t-P:59.92.112.1 Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
          RX packets:21571 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16315 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:30729107 (29.3 MiB) TX bytes:1278676 (1.2 MiB)

Hi ClovisFabricio ....

Exactly the same ......
"sudo pppoeconf" is the command that i got from the answer of the question no 1309...
thank you once again...
But now its not asking for username and password....
im turning on the modem and using net. thats all...

and one doubt ClovisFabricio....
You have said ""as opposed to ADSL "always-on" connection"" in the first reply, So
Is using user name and password is wrong in case of ADSL modem?

Thanks ClovisFabricio, that solved my question.