I Can't Play Halo 3 Custom Maps?

I Cannot Play Halo 3 Custom Maps Because It Says I'm Restricted From Playing user-created Maps. And I Do Not Have Family Settings On And I Changed My Email On It But The Age From The Email Account Is Over 18. It Worked Fine Before I Bought The Microsoft Points And Reedemed The Code. So Can Anyone Please Help Me? I Need A Quick Answer On How To Fix It. And I Also Made A New XBOX LIVE Account But It Works Fine On It But I Still Want To Use The Account I Still Have Right Now.I Can't Play Halo 3 Custom Maps?Okay, this used to happen to me the reason is that first off you might have to complete the Campaign (any difficulty) Or you just have to play %26quot;lone wolfs%26quot; (type of game)