Hmm I am not sure what is happening here. If your teammate saves the project with rotation checked, and you open the file after, do you see Rotation checked in the General Settings of the project? There is also a Flow Example that is pre-set up with Rotation checked. Does this have Rotation checked and run? Mine is located in C:>Program Files > SOLIDWORKS Corp 2015 > SOLIDWORKS Flow Simulation > Examples > c5 - rotating impeller > ready to run
Is the word "Rotation" there, but the checkbox is just missing? Maybe there is a graphics card driver problem.