[ixp1200] EN2505 card causes PC to hang.

Hi, I have plugged in an EN-2505 evaluation board into a PII PC running RedHat 7.3 . I was expecting to see the 2155 PCI-PCI bridge listed in the ouput of the lspci command. However, it was not detected. The same card when plugged in a PIII with RedHat 7.2 casued the PC to hang ie it did not boot. What are the reasons for the above behaviour ? 1) There is no software/OS running on the board (except for the System Moniter). The switch SW1301 is set as 001 (System Moniter) . 2) The switch SW0201's bit 1 is on for Slave mode operation and the bus width not 64 bits. All the other bits are default values. Thanks, Kamesh.