Excel 2007 opens as a blank/gray screen - please help :*(

[Deebeesss]

I have MS Windows XP, Prof Version 2002, sp3 and my problem is whenever I
double click one of my Excel 2007 files, Excel opens as a blank/gray screen.
I open many excel files each day and this is really frustrating.

I've been looking around and searching for an answer online and I've found
and tried two possible solutions:
I clicked the Excel 2007 office button, Excel options, Advanced, and under
General the box for 'ignore other aps' was unchecked - so that didn't work (I
checked it and unchecked it again and no help).

I also tried this:

Start
Run
excel /unregserver
excel /regserver

Neither of these has solved my problem.

If you can solve my problem I would be so happy!

 

[Bob I]

Try enabling one of the Excel add-ins, Solver for instance.