Help SMS notification won't go away!

[atech087]

I got a text and i deleted it. The yellow messaging thing in the notification bar is still showing up but when i tap it, it takes me to the new message screen and says "You have entered an invalid adress". I clear the notification but whenever i tap on the messages it shows up again. The messaging thing on the bottom of the home screen has a yellow 1 by it. (See link Help with phone - Imgur ). Someone please help me!