Mobile Phone Files Download

I have an annoying issue with my blackberry – I accidentally typed an e-mail address incorrectly and got back an undeliverable response (I left out a letter in the name). Now, I can’t get rid of the incorrect e-mail address in the “to” field — whenever I go to type that person’s name, the incorrect spelling comes up first. Does anyone know how to delete it? I already tried “clear field”, but that only works for that particular e-mail. Hope this makes sense…