Actually, I used 6.9.2 ; I've tried 4.6.1, 6.1,6.5, etc, all with same result. Only one ISA slot in computer, all other computers I have are PCI only. Guess it's time to get a newer board -- 8 year life is better than most computer stuff I own (but I still use my 1960's-era HP 608C and 141T/8554 RF test equipment!).