It may be a file that is loading automatically from your XLSTART folder.
Check here and remove any files that should not be loaded by Excel at
startup:

C:\Documents and Settings\<login name\Application
Data\Microsoft\Excel\XLSTART


--
Jim
"Manju" wrote in message
oups.com...
|I get the following message window whenever I start EXCEL in my User
| ID. Other users of my computer do not get any message
|
| D120B100: file format is not valid
|
| Please help to remove this message.
| Manju
|