Workflow didnot send email

I use the trial version for Sitefinity and configure the SMTP already.  And I also checked the box for notification. But when I have a page to send for approval. The email was not sent. Is it related to the configuration or because of the trial version?

Try this please, 

http://www.sitefinity.com/devnet/forums/sitefinity-4-x/bugs-issues/email-notification-comments-workflow.aspx

Thanks, Su.
I just got confirmation letter from Telerik which said for trial version the notification email won't work for workflow.