sms alert but no sms!

i have an iphone 3g and it's been jailbreaked since I got it, it's running 2.1 and I have had this problem since I updated I get the sound and everything of an sms so I get my iphone to see it but there's none! it may be because I installed asVibra from installer that makes my iphone to vibrate 3 times instead of just 1

any help would be appreciated

Never mind i did a research and its a new feature of 2.1 i tells you when you have an unread sms thanks