emails queued until reboot

[smay]

I have a new laptop that appears to be setup identically to the old one. I'm
working on an ASP page that sends an email. On the old machine the emails
are send just fine (CDO or CDONTS). However the new machine holds everything
in the queue folder until I reboot. After reboot, everything in the queue is
sent, but all new messages from the web page are again queued. I'm running
w2k sp4, iis 5, not using a smart host. The event viewer gives "Message
delivery to the remote domain "xxx" failed for the following reason: The
connection was dropped by the remote host.

Any suggestions?