Problem with recieved packets from modem

[D3Ee@th]

Hi everyone,
PLZ can anyone help me? I have new net and new modem--- Touchstone Cable Modem CM450
If I try to connect with my notebook and it works but if i try to connect modem with PC no chance. I even try USB connection with drivers but the same problem. My PC doesnt received any packet from modem.
My motherboard is: ASUS M3A32-MVP DELUXE/WIFI-AP cant be some problem with BIOS. My PC is new (1 mouth)

 

[sturm]

Are you using the same network cable for both the pc and the laptop?
What does the network connection on the pc say when you plug the cable in.