Importing CAD file to matlba via Simmechanics

Hi, I am trying to export CAD models to mat lab via Simmechanics, but it always giving an error message saying that the license is not found and therefore the simmechanics block configuration can not be made. I am using the school matlab, the installation of simmechanics is done perfectly. Only the file importing process does not work. I would appreciate anyone's help. Thanks

[Joachim Schlosser]

Which CAD system, and which release of MATLAB are you using?

[Nilecram]

I am using Solidworks 2011-2012 and Matlab R2012b