RS232 Problem

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I have a program that communicates with an instrument via the RS232 interface. The program worked fine with the equipment, and a simulator that I built for test on another WIN98 computer. However, with the new WinXP computer there is no receiving of data from the port. If I go into the Device Manager and disable and then re-enable the port, everything seems to work fine. Any ideas as to why this is happening? My customer has a recent WinXP computer that runs an earlier version of the program, but not the latest versions, giving my "communications failure" response when it tries to receive data.

Thanks for any insite into what is happening. I can give more info if necessary. The ports are running at 9600 baud for one program and 19600 baud for another. It occurs whether I use Com1 or Com2.

TRCSr


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