.mac problem with mail 3

Im having a bit of a problem with my dot mac account with mail 3 in Leopard. I did the upgrade from 10.4 to 10.5 and everything went smoothly except for my mail. I can recieve mail but cannot send it. When I go to click on the send button nothing happens. The button doesn't even look like it can be clicked on.

Has anyone els run into this problem? Would deleting my account off mail and then entering the information again work? If so how would I save all my mail in my inbox and out box?

Thanks for your help,

Jonathan

 

Great thanks.