Hi Robert
Very strange. I would suspect that the code is fine as it does work - consistently on some computers, and somewhat on the other one. So it's more than likely something environmental (yeah, call me a genius 
).
I wonder if an HTTP sniffing utility like Fiddler may tell you what is happening there.
Since this is a 32 bit app, yo could also use the Modules utility and compare the runtime (CR and other) that the app loads.
- Ludek