VB Compatibility With Windows 7 64 Bit

May 17, 2010

I have a small application I wrote in VB with visual studio express. This app uses a timer tick to wait for a certin time, the opens several comm ports, reads data, creates an output string, an sends the string via email. I tested this app for several days
on a windows 7 32 bit machine, with no problems. I compiled (published) the program, and am attempting to run it on a windows 7 64 bit machine. However, on the 64 bit machine, it freezes up and can only be stopped with Task Manager.

at the time the app hangs the only things going on are 1. a timer checking to see if it's time to read the comm ports. and 2. a background thread checkig to see if the internet is available to email the string.

I tried ;loading visual studio on the 64 bit machine, and compiling the app there, with the same result. However it seems to run (tested for 1 hour) in debug on the 64 bit machine.

Has anyone noticed anything like this? any ideas?

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