Can't Send Emails - Help!

When running Outlook 2002 inside Parallels (Windows XP), I can't send email. I've used Parallels Transporter to migrate accounts from old pc to my imac, so email account details are identical.

If I use the Test Account Settings in when configuring my email account Outlook sends the Microsoft Outlook Test Message, but never to Outlook in Parallels. If I turn on Outlook in my original old pc it receives the message. If I try and send any other email within Parallels the email just stays in the Outbox.

Help!