for all those who have the same webcam named in the subject, the spca5xx package doesn't work because of a mistake from the developer of it.
Here is the answer from the developer:
This is my mistake :( line 4914 replace memcpy(&spca50x->funct,&fspca561,sizeof(struct cam_operation)); by memcpy(&spca50x->funct,&fzc3xx,sizeof(struct cam_operation)); Thanks for pointing me the mistake. regards Michel Xhaard
The file is drivers/usb/spca5xx.c
I have change it and rebuilt the spca5xx. Now the webcam works again....