Exporting dxf file via autoCADR11

Hi

I have been using CorelDRAW Graphics Suite for the past few months with no problem. Since 5 days ago, when I go and edit/smooth my text and save as dxf in autoCADR11 and reopen the smoothed areas are showing as lines.

It was working perfectly up until now, and I can only save in that autoCAD for my toolpath for my CNC machine. 

Corel techs have tried to help, and last email said saving as autoCADR11 is not compatiable. Well it was until 5 days ago.

Ive tried EVERYTHING. 


Any help will be grateful 


Thanks Sarah