Komori Spica 429 lateral distortion between unit

Image on my press have a distortion between second unit and third unit, lateral distortion (right to left). The screen is good but the crop marks K+C is outside (But k+c are registering) and M+Y are inside (And the M+Y are registering) of the marks , all my packing is ok and i've checked all the gripper and they re good. Can anybody have an idea of this problem?