draftsight geometry cut and pasted to solidworks

I have bought draftsight. I went to cut geometry from a draftsight file to a solidworks file and nothing happens when I go to sketch-edit paste. when I had autocad and did this it worked fine. why not with draftsight files???? I do this quite often as it saves me a lot of time on complex parts like airplane airfoils... thankyou in advance for your help..

 

regards,

 

Lester Palifka