I just picked up a used STXL 11k with a FW8G-STXL FW. Maxlm Dl ( 6.26) gives me error codes 6 and 17. The filter wheel will not connect. I am using SBIG universal for both camera and FW and standard for setup filter. I checked my drivers they are current(firmware ver 2.54) When using CCDOPS ( version 5.66) I can connect to the FW and exercise it no problem but when I try to take an image I get shutter errors and I can see the shutter acting crazy, going left and right and stopping halfway. Does this sound like a repair job is needed?