Hello,
M-Series DAQ Boards can be used to communicate to an SCXI chassis. I was able to configure an SCXI Chassis with a 1100 module and a 1300 terminal bloack without any problems. They also did show up in MAX. I wanted to double check if you did add the device as 'New DAQmx Device' and then select the chassis and then configure it. If you did all this and still not seeing the chassis, please let me know.
-Arun V