Try to re-register Excel.
Close Excel first and On the Windows Taskbar
1) Start>Run "excel.exe /unregserver"(no quotes)>OK.
2) Start>Run "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 Start>Run "C:\yourpath\excel.exe" /regserver(quotes
required)>OK.
Have your CD ready just in case you are asked for it.
Gord Dibben MS Excel MVP