I have added a new part to an assembly that is intended to be an embedded part (saved with assembly file).  I select the part and than insert a sketch, with the intention that the sketch is used for making the part.  However, when I am done I find that the sketch is part of the assembly i.e. inserted below the part insteado of into it.

Can I get this sketch into the part?  dragging, copy/paste don't seem to work.  This is the 3rd time this has happened and it is starting to infuriate me.  I know I should check before I start drawing but the whole procedure for starting a sketch inside an embedded part seemed to be more mysterious than it needs to be.

Thanks,

Marty