Cannot connect to internet via Ethernet cable.


I am completely new to the beagleboard-xm. My problem is i am not able to connect to internet using my ethernet cable. And moreover i could only use Xubuntu session login because when i choose to use Ubuntu it throws an error “failed to load session”.
I tried searching on google but to no effect.

Can somebody here help me out please. I am stuck, without the internet i am not able to update the softwares also.

Thanks in advance.