3dmCurves2DXF not working with 'MoI 3.0 beta Oct-25-2011' created files

 From:  Lars.Ulu (MATTEO)
I have just tried to convert my MOI file to dwf as described above and then opened it in DraftSight but I did not have the same successful result. Just a few splines are appearing in the drawing, nothing more.
I am now wondering if I have done something wrong.
I used the V3 beta, I have to do something particular with MOI before converting the file to dwf?