Hi, I have just bought a MicroStar slim case(MS-6207) with build in Intel 82558B 10/100 LAN chip. I install RedHat 6.0 and it can recognizes the LAN card(driver eepro100). I can also pin the card's IP address, but when I ping other machine or another machine ping my one, the system freezes. Could anybody tell me what's wrong and how to fix it? Thanks. Jin