Have you checked to see if you have the vibration turned on in Settings? As simple as it may sound, after I DL'ed GO SMS, I spent days trying to figure out why my messages wouldn't vibrate. I normally don't have vibration on, and that was the reason..
Menu settings/sounds
hello i face that problem now even if the vibration is switched on , it doesn't vibrate at all even using the vibration function test using *#0*# it doesn't vibrate !
So what should i do ?? hope you help me .