gspca -- invalid module format

I have a Creative Webcam Instant and a logitech Quickcam Express, lsusb recognizes them as follows:

Bus 001 Device 004: ID 041e:4034 Creative Technology, Ltd
Bus 001 Device 003: ID 046d:0870 Logitech, Inc. QuickCam Express

Both are supported by spcaxx (which is gspca under Fedora if my understanding is correct) according to this site --> http://mxhaard.free.fr/spca5xx.html

I've installed gspcav1-kmdl-2.6.20-1.2948.fc6-1.00.12-3.fc6.i686.rpm from ATrpms.

Now here's the problem. When I run,

/sbin/modprobe gspca

I get the following error:

FATAL: Error inserting gspca (/lib/modules/2.6.20-1.2948.fc6/updates/drivers/usb/media/gspca.ko): Invalid module format

Any idea where I went wrong or what the problem could be? If you need any more info just ask and I'll provide asap. Thanks!

No one has ANY advice whatsoever?

Is this in the right section? Should I move this somewhere else to get some input? Links to tutorials, faqs, etc would even be appreciated.