Motorola Droid will not make noise or vibrate for notifications (such as text, or email, etc...) but will play ringtone for phonecalls. When I restart the phone, it will work maybe 3 or 4 times, but after that, it stops working again. The phone will light up, but no vibration or sound. I've checked the volume settings, and the notifications and ringtone settings, and everything like that... it's all normal. Any suggestions? Anyone else had this problem??