Are there any special concerns creating a distributable .exe with VFP 6.0 (including some Active X components), which may be run on machines using a very early version of Win 95?

Particularly, I have an app that works fine on several test machines in my office (running Win 95 "B"), but when installed on client machine, odd errors occur, for example:

I am using a calendar control which is "not found" on the "problem" client machine. There was no problem with it being found on the test machines in my office. I believe that it is not properly registered on the "problem" machine. It was installed on the "problem" machine, however.

Thanks in advance.