6DOF robot arm motion study error??

hi every one

I am trying to simulate 6DOF robot arm using solidworks 2013 premium
as files show every thing works but when I change motor1 rotation angle than zero value
then motor5 will not rotate to sepecified value
when I change motor1 rotation angle to zero , motor5 works as expected

I uploaded files in the following link
https://docs.google.com/file/d/0B9nwvM7PIoSnTU5xaXVrdDBOZHc/edit?pli=1

can any one help me ???

thanks alot

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