Not sure what is causing your problems. I am currently using the Max with the Sketchup Plugin and emitters and shadow locations are working well. Are you using the plug or are you exporting to studio?
It is the Kelvin setting in Maxwell which isn’t working. If you use Type D65, it tries to use 6500 Kelvin.
Select NO for Use Type in the Maxwell export emitter popup window. You can set the colour of the SU material to 255,255,241 for D65 light.
Sheik