MS Office extension not recognized anymore.

Acrobat 8.1.1 Pro. (OS = XP), as part of the CS3 premium edition.
MS Office 2003

I can no longer get Acrobat to recognize any of the MS Office applications extensions (.doc, .ppt, etc...) for use with either Create PDF "From File" or when using the Combine Files feature to Merge or Package. The extensions are no longer even listed as an option in the dialog box, or in the Preference settings under "Convert to PDF".

FYI- I can still use the PDF Maker functionality from within the MS Office application to create a PDF, but I demo the package features and create from file to students, so the workaround is useless to me.

Any Idea what could have happened, or more importantly how to fix?

I have re-installed the Acrobat 8 application, and the problem still exists.
I'm truly puzzled.

[b]Screen Shots:[/b] - You may need to open image in separate window/tab to view clearly.

[b]Combine window alerts that the file types are not supported[/b]
[img]http://img85.imageshack.us/img85/6077/combinebr2.jpg[/img]

[b]In Acrobat Preferences the Convert to PDF setting is missing the MS Office extensions[/b]
[img]http://img338.imageshack.us/img338/4962/converttopdfprefsch0.jpg[/img]

[b]In the Combine feature's Add Files box the MS Office extensions are gone[/b]
[img]http://img160.imageshack.us/img160/1935/missingextensionsyb3.jpg[/img]

[b]FROM A DIFFERENT PC with same Acrobat and MS office versions.
This is what the previous screen shot from my laptop should look like.[/b]
[img]http://img338.imageshack.us/img338/7600/extensionsavailablezv1.jpg[/img]