Can someone tell me what's a good modem to play on-line with Playstation 2?

I have to make a direct connection to the web so i need an ETHERNET modem.

I have the Network Adapter yet and my connection speed is 4.8 MBit/sec.

I've tried with the D-LINK DSL-300T but with no success. I've spent so much time to configure it but the modem still not work with PS2.

Can you help me to find another way?