It depends on what you mean by "appears not to be working." If you're getting the "e-mail has not been sent" message, it might be due to an unmentioned character limit. If you type your message in 1 paragraph, you'll get to a point where anything you type just disappears. But if you insert line breaks (more than 1 paragraph), the character limit doesn't prevent you from entering more text than you're allowed, and thus, the e-mail doesn't send.
That's all the help I can give, so if it's another issue, good luck.
Kelsey