Is it connect via serial (rs232) or the parallel port? I'm assuming this is HPGL control? if so a printer style driver will need to be loaded? also does the software require a dongle to work? Might be work giving them a call and just check?

Serial Communication

 WinAMC® uses a proprietary communications protocol, designed to minimise serial problems between your PC and the AMC. WinAMC® automatically detects the presence of an AMC machine control on the serial link and communicates with it at the maximum baud rate (up to 115,200 baud).

Any communication errors are automatically detected and corrected. This ensures that the AMC and WinAMC® are able to continuously communicate even in the noisiest of environments.