windows mobile notifications always "on top"

[belvedere]

even when i lock my Mogul, when I get phone calls i can still answer without unlocking. i've tried toiling with that S2U2 program and both phone calls and SMS seem to overpower and and negate the purpose of having a "locked" phone. is there something i can do to keep from letting the notifications always overpower the locked screen? i can disable SMS notifications, but you can't disable notifications for incoming calls.... i'd rather not accidentally answer a phone call in class or while i'm at work... thanks.