Cosmos Motion Mates

Is anyone here using Cosmos motion with solidworks?
The cosmos motion manual says that the program automatically changes
solidworks mates to the equivelent cosmos motion joint, but when i make a model of ,for example, a conecting rod attached to a big end ( a revolute joint in cosmos motion) it becomes the wrong type of joint in cosmos and all the joints have to be corrected manually ! any one know why?
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