Attaching Zip files

[kel]

Hi

Does anyone know why there are times when I'm trying to
attach zip files and I am browsing for the files through
Outlook, the zip files will not appear in the dialog box
provided by Outlook...

The strange thing is that I am able to attach zip files
without any problem at other times...

Can someone kindly explain why Outlook is behaving so
strangely? Any advice/suggestion would be greatly
appreciated...

Cheers