My PC has 1 LAN card installed and work properly, after I inserted 1 more LAN card to the mainboard, it can't reboot and even can't load BIOS (it can't carry out memory test and the PC halted at the screen just showing the CPU's speed) and of course can't load OS(win2k pro) too. When I remove 1 of the LAN cards from the main board, everything work properly. How can I install both 2 cards in my PC?
BIOS : Award Modular BIOS v6.00PG
LAN card : Realtek RTL8139(A) PCI Fast Ethernet Adapter