cannot filter excel files in "files of type"

W

wli2k2

I have Outlook 2003, and when I try to add an attachment, I cannot filter
based on Excel files in "Files of type". Excel is the listed but other like
Word are. The entire Office 2003 suite is installed on the PC and I tried
reinstalling to no avail.

Also, Customize is grayed-out under the tools menu in Outlook\new mail
message.

Please help me out.

thanks.
 
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