blackberry movie machine no valid email

My 9320 recently downloaded an app call blackberry movie machine to download movies. When I got it it said that i can get a membership number for 1 week if I gave them my email address (so they can give it to me, the membership number) but every time i put my email address in and press ok it says enter a valid email address. I have use several others and still its says enter a valid email address. This is the free trial so no money was taken. Can anyone help me solve this problem. Thanks if you have replied.