OS:XP Pro, OE6.

When I try to send an MP3 as an attachment (3meg), I get this:

A time-out occurred while communicating with the server. Subject 'vvv',
Account: 'mail.comcast.net', Server: 'SMTP.COMCAST.NET', Protocol: SMTP,
Port: 25, Secure(SSL): No, Error Number: 0x800CCC19

I've increased the time out span to 3min with no change.

I can send other files ie: photos larger in size, with no problems. Any
ideas and thoughts are appreciated. Thanks.
Bob