path mate motion study

I have a trike assembly and i would like to move it around a corner of a road. 

I used path mate to mate it to a sketch

I was successful in mating it and giving it a path mate motor to move, but the whole assembly revolves everytime I move it, 

What am I supposed to do?

And I get errors when I use rotary motors to make the wheels turn.

I am not finding any material to do this motion analysis.

Here is the link to the video

https://youtu.be/284Su53eQcM 

https://youtu.be/ySN13801Xqg 

SolidworksMotion Studies