Network Issue Help required

Hi All gurus,
I have instlled Ubuntu on a partition of my PC having a lan card(Realtek).Windows is able to detect the lan card but Ubuntu cant...Also I would like to know from where I can download a p3 player for Ubuntu
Any solution ..
Any help is apprecited
Regards
--Nitinw

Network Issue

Type the below command from the terminal window and post the results of:lspciand what is p3?