Webcam Software problem?

I have a creative webcam video blaster webcam ..i downloaded the drivers for the camera as i lost cd .. after dowloading drivers i right clicked on My Comp and from DEVice manager i chose to AUTomactically Detect .... it starts but then a problem shows ... "wcvid.sys" file missing .. is frustrating as i tried 4-5 times same result..please HELP PPL !!!!!!!