Possibility to import a 2D CAD file to COMSOL?

Hello,

I am running the last version of COMSOL (4.3b). I tried to import a 2D CAD file to COMSOL but was not successful! Generally, is it possible to import a 2D CAD file to COMSOL or only 3D files? If so, through which format and how?

Your prompt reply would be greatly appreciated!

Thanks so much in advance,

Afshin