SimMechanics link not exporting properly

Hi I have trouble with exporting from Autocad Inventor 2013 to XML and STL files(Matlab R2013B). It does export and it seems like the XML file are ok but the geometrics(STL files) are corrupt.

Here are an exampel of my export files 'STLB ASM 219.00.00.0000 COLOR=¥ÑÑÿ h~ ¿.½û&5?iŽ4?¾v¿üþAð_!À>qq¿C<A=R6À\¢¿üþA\"Àï=ë{÷½Ÿ4?_Â2?¾v¿üþAð_!ÀÛ¿C<A‰¿2À>qq¿C<A=R6Àï=”;¾:j5? '

And here are from a proper file(matlab example) 'solid base_Default_sldprt facet normal -3.999391e-002 7.073900e-001 -7.056911e-001 outer loop vertex -1.027698e+000 9.514711e+000 2.846838e+000 vertex -1.055369e+000 9.187252e+000 '

Does anyone have any idea of what im doing wrong or what is wrong ?

Thanks in advance