Welcome to iPhoneForums, Smokey Bear!
Does this happen every time you try to send an email from the Contacts app?
Just a test: make sure the Mail app has been closed before you try sending an email through Contacts. Force close the app, then open Contacts and try sending again.
To force close, double tap the Home button to show the multitask bar. Then slide the picture above the Mail app icon towards the top of the screen.
If this works, it's a glitch, experienced by a few other iPhone users as well.