Motion Analysis, angular momentum

First of all, i'm really a newbie in the sw, so what i'm be doing can be really obvious but I've been trying to measure de angular momentum of two plates that rotate around a simple rod, i added a motor at the end of the rod to rotate the plates, everything works fine when i put in animation but when i go to motion analysis the components don't rotate and when i try to measure the momentum or even the angular velocity in the plate the software shows 0 in both of then.

SolidworksMotion Studies