Acrobat Reader control will not stay referenced in Access

[David]

Folks,

I have a form in Microsoft Access that has the AcroPDF.dll control in
it. I use it to browse to PDFs on my file system. Problem is, the
PDF control does not stay referenced in Access. The form works the
first time, and fails the second time. I used to occasionally get an
error that the control was not registered, but now this error does not
show up (although the control is definitely not in the references
list.)

Any thoughts on this?

Thanks,

David