How Can I Convert a 3D solidworks File to 3d AutoCad File

Dear

Actually I am Using 2012 version For Solidworks 3D Cad Software.... And 2013 Version for Autodesk Autocad....

So, Should I Download the same Versions for both???

After this Can I Found the Accurate Solution of my problem?????

Please Tell Me????

SolidworksImport export