Web cam LED remains on always

Hello,

I have dell inspiron 1525 laptop with inbuilt web cam (Creative). The LED remains on even after the complete system boot up and also camera does not work (when i try to capture the image it asks me to reconnect the camera. How can i reconnect it as its inbuilt). Earlier LED used to blink once and goes off after system boot up and camera was working fine. Please tell me what might be the problem?