I have a similar problem but the unregister register didn't fix it. neither
did the Ignore other applications.
My problem may be related to a previous install and removal of Office 2007.
I had numerous problems and even program crashes with 2007 so finally gave up.
I removed Office 2007. I even followed the MS kb
http://support.microsoft.com/kb/928218 to edit the registry in an effort to
remove the offending 2007.
Did a complete fresh install of 2003 but dbl click of a file will start
Excell but not open the file. If I then select OPEN a file and navigate to
the file in question it will open and all appears OK.

Suggestions appreciated.

"Ron de Bruin" wrote:

Hi MFEdu

Try this

ToolsOptionsGeneral uncheck "Ignore other Applications"
Exit Excel and try again

If this doesn't work try to re-register Excel

Close Excel first and
On the Windows Taskbar

1 ) StartRun "excel.exe /unregserver"(no quotes)OK.
2) StartRun "excel.exe /regserver"(no quotes)OK.
See the space between exe and /regserver

You might have to designate a full path to excel.exe.
In that case StartRun "C:\yourpath\excel.exe /regserver"(no quotes)OK.



--
Regards Ron de Bruin
http://www.rondebruin.nl


"MFEdu" wrote in message ...
I can not open my excel files.
When I select an excel file in Windows explorer, excel open, but not the file.
How I solve this problem?

Thanks.