how to deal with sim-mechanics issues?

Hi out there; for my project, i need a simulator of a 2DOF parallel robot in matlab; it's been designed in solid works and imported to sim-mechanic via specified XMLs. Every things works properly if i disconnect one of the the revolute joint which changes the robot structure into two separate serial robot. The question arises at the time all links are connected -in the generic form of parallelogram architecture-; when i run the parallel robot, one actuator cease to apply -meaning there is no sense of postion from it's sensor (it's hardly changed about 5e-10) and there is no torque actuation-. but the other actuator works fine and the speed of simulation mitigate grossly. i upload The Simulinks too if it could help. i wonder if one could help me out with this... thanks in advance

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Do you mean you imported the model as XML/STL files? HTML files are the type you'd use to create a web page, so I'm not sure those would work well with smimport ;)