Default [Q] camera failed gt-s5830i

Hi, After clearly doing something wrong when downgrading from JellyBlast to the stock Ginger Bread ROM, I now get this error when I try and use the camera,
"WARNING,
Camera Failed
errormessagehandler.handlemessage (-1)"

and now i back to Ginger Bread 2.3.6 orginal but the same problem

please help me