Outlook express attachments

???
Everytime I try to send an e-mail with an attachment I get a timeout message. If I disable Avast then I can send the attachment. Why does Avast not allow me to send an e-mail with attachments?

Please help!!!

It takes time to scan large attachments, during this time OE thinks that the server is not responding so gives the timeout warning, increase the timeout duration slightly in OE.

http://img.photobucket.com/albums/v325/for-dwr/timeoutoe.jpg