>>
>>Is there a virus on your LAN? On those machines?
>>

All virus checks are coming up clean.

>
>Sounds like something is causing the XCClient.DLL to timeout maybe??? That would explain why it works via the debugger after a SET STEP ON.
>
>Paul do you have any more network traffic on your network today than usual? Or anything that could be slowing down your network speeds?

Network traffic seems normal, nothing seems out of the ordinary.

It is very unusual to me that hitting the execute button in the toolbar would cause the software to operate differently from just type "DO TEST" in the command prompt.