Saving files

Hi all. I'm having a bit of an issue and your help is greatlyappreciated.
I opened an idf. of a PC board file in circuitworks then modeled itinto solidworks, it came in as an assembly, then I made somemechanical changes to the board. All I did was add a hatch sketchand 4 little holes. The problem I'm having now is getting it backinto circuitworks and export it as an idf. file again, to be openedup in Mentor Graphics.

Thanks

DaveSolidworksEdrawings