gooduser1,
Send/Receive button being grayed out can also mean that you are over quota if you are using a service for email, or that your Outlook profile is corrupted (which can also be caused by a lot of email).
Do you recall the send/receive button being grayed out before you imported the old email?
Reconfiguring a new profile in Outlook could solve your error. You can toggle between the new profile and this profile if you need to compare.
Hope this helps.
Masta7Mail 
Seamlessly connected via hosted Exchange with http://www.themessagecenter.com