Please, can anyone help! About two years ago I purchased three STXL cameras (2 x STXL-6303 and 1 x STXL-11000) plus AOX and self-guiding filter wheels from OPT. They remained in their pelican cases until the weekend when I decided it was high time I upgraded my old STL cameras (6303 and 11000) even though they were still working fine. My obseratory is Savannah Skies Observatory near Chillagoe in Australia. 1. The first STXL-6303 would not power up at all - will send this to Bill Lynch for repair. Obviously a hardware issue. 2. The second STXL-6303 + SGFW + AOX powered up fine and when connected to Sky X (with all the latest drivers and firmware) cooled easily and the filterwheel worked fine, but when attempting to take an image the shutter failed. Sky X said there was a shutter driver error - 30017. I was subsequently unable to rotate the filterwheel or take a photo. 3. The STXL-11000 + SGFW + AOX powered up fine, but when connected to Sky X (with all the latest drivers and firmware) after about 30 seconds, the cooling fan sped up for a few seconds and then the temp readings went offline. I was subsequenlty unable to rotate the filterwheel or take a photo. Sky X said there was a variety of driver errors - Operating System or Filterwheel - or it simply froze mid image with no error statement. These problems happened repeatedly using different computers and different camera control software (Maxim DL). Oddly, at one point I tried a slightly older driver with the STXL-11000 - Sbigudrv 4.90 build 1. This time it cooled perfectly and the filterwheel worked perfectly (which it did not do with the latest build), but then it failed from a shutter error that was identical to the STXL-6303 driver error. Am sure this is a driver issue, but what do I do next. I've tried everything.