Before installing VFP7 I could view pdf files using Internet Explorer.

After installing VFP7 I receive "Error Locating Object Handler" with the following text:
"There is no viewer available for the type of object you are trying to open." The address of the object is "createreport.asp"

Using another PC with only VFP6 installed I can view the pdf files. The Microsoft solutions given on their websites doesn't help.
I tried everything what I could find on the internet.
It is clear that is caused by VFP7.

I appreciate any help.