No Sound for Incoming Texts!!!!!

[timbales1]

I have a 3gs on 5.01 thats jailbroken. For some reason I'm not getting any sound or vibration when the screen is locked. Im getting the sound when I send my text but nothing to notify me if the phone is in my pocket. What is the proper setting to get this to work. Ive owned several iphones where this was never an issue. Please help.