Warning !
If InpOut32.dll does not work with Your port, without any error message, it could be that the problem is related with the Oxford Chipset used on some PCI-cards (or motherboards too ? ). I had myself that trouble with a (Oxford) PCI card, and the dll worked fine with the integated port on my motherboard ; changing the card solved the problem ! Google for the combination "InpOut32.dll Oxford" ... I don't know if there is an update of the dll working with those chips.