I neglected to include information about the machines in question.
The setup consists of a CE NC2500 EA connected to a Thermo Finnigan Delta Plus mass spec.
The PC is running Windows XP with Service Pack 2.0. It has no internet connection. It uses an Intel P4 2.0GHz processor w/ 512MB RAM and a National Instruments PCII/IIa (ISA slot) GPIB card.