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Question: Problem with 'follow me' camera set up.

I am a new owner of Logitech QuickCam Pro 9000. Used it for one week on SKYPE. My friends on the other side are all amazed by the quality picture it produces.
However, today ther picture (camera set on 'follow me') was freezing in one frame and it did take about 20 secunds to move (follow) my movement of the head.
The computer is top notch, recently upgraded to the tune of $ 600.00.
First couple of days of use, there was not problem with camera focusing on the person occasional move in picture frame.
Can you advise what is likely the problem?
Would greatly appreciate it.
Peter Solarik