Droid Incredible - problem with phone setting to vibrate


Not sure if this is a user error because this has been working fine until the last couple of days, but my Incredible no longer will vibrate with an incoming message or phone call.  I have gone into the settings under messaging and have sent MMS and SMS and  received MMS and SMS all set to vibrate. It is also not vibrating when I receive a phone call. The phone is in Vibrate only mode. Is there something else that I might be doing wrong, or is anyone else experiencing the same issue?