I had a similar issue. 1st NIC is integrated on motherboard, 2nd in PCI-E slot. The quickest workaround was to disable integrated NIC in BIOS and plug a cable to 2nd NIC.
Alternatively, you might be able to use additional NDIS2 driver parameters in protocol.ini - some supplied cards / NDIS drivers support SLOT parameter. But I personally never tried this solution.
Good luck
Igor