I have a new STX 16803 with AO-X guided with an external guide head. The AO works fine with CCDOPS but I have a problem with Maxim. After calibrating the unit and locating a guide star, when I try to guide I always get a Guide star fade message. If I physically move the AO window on the screen, then the guide star shows and the guiding begins. However the AO unit rapidly moves to either 0% or 100% because the guide star position and image are not updating unless I move or click on the AO window. I have tried this with different settings and different computers but I get the same issue. One thing I have noticed is that the firmware is not the latest - stga.bf2 is version 2.41 compared to release 2.43. Would this cause the problem? I am reluctant to update the firmware unless it is really necessary.