finally got one! need help with ps network please!

ok just bought the MGS4 bundle and its amazing however when i try to sign up for the PS Network it says i cant use the email address i gave it, i have tried 3 different ones. somebody please help

thanks!

Im sure there's some email address you can use. There's infinite possibilities...don't think anything is wrong with PSN.

nevermind i got it

but thanks!