I am not sure the driver SPCA5xx is the right one for this webcam. Check in the spca5xx driver site (
http://mxhaard.free.fr/download.html).
Anyway, I have a webcam from BenQ that works with the driver spca5xx.
To be sure this drive is working with your webcam, download from mxhaard's site, the program spcaview. If spcaview can display images from your camera, then you are sure the system (kernel/driver/usb/camera) is working, and then, you need to find the problem in another place. In my case, I was trying to put my webcam to work with "xawtv" and I figure out the problem is "xawtv", not the driver.
My advice is to uninstall the kernel-module-SPCA5xx-3.6.13-15.8-.i586.rpm and compile yourself the latest version of the driver from mxhaard's site. I did that.
keep posting and I will help you as much I can.
Cheers,