I am using an STL11000M for remote imaging. It has been causing MaximDL v6.11 to lock up (program freezes, Windows7 reports "not responding"). The lock-up occurs at the beginning of an exposure; it may occur with a manually triggered exposure, or one sent from my automation software (CCD Commander). There is no consistent pattern as to when the problem occurs; it may happen during the first exposure of a run, or after hours of successful imaging. When the lock up happens Maxim does not respond, but can be killed by hitting the "x" in the right upper corner. Maxim can then be restarted, but this is where it gets weird; if I try to reconnect the camera, Maxim immediately locks up again. I cannot reconnect to the camera until it is powered off and back on, then everything runs normally until the lock happens again. This sounds like a connection problem with the camera, except that it always happens at the beginning of an exposure. I base this on the fact that it happens with a 5 second plate solve exposure as well as a much longer regular image exposure. The last entry in the Maxim log is always "guider tracking started", "guider tracking stopped" or Maxim 6.11 started nnn.nn exposure..." The camera was repaired by SBIG in Dec. 2015 (new analog board, as I recall), and put back into service in Feb. 2016 at a remote observatory. The problem has been happening since then, but unfortunately I am 1300 miles from the camera and cannot check it physically.