help troubleshoot a bad lens and what to do to fix it

i have a samsung digital camera st150f. i am having trouble with the lens on the camera. i press the on button the lens comes out for about 2 sec. and than it go's back in,then i get a message that said. the zoom did not operate normally. insert the battery again and turn the camera on. if the camera does not operate normally. do not put excessive pressure on it and contact the service center. so, can anyone tell me how to fix this or can it be fix. maybe i need to get a new lens,i do not know. can somebody help me out!! by the way i took the battery out and put it back in six times it still did the same thing.