[Rally]

Hi,
I have been trying to save a File that was created with Mastercam X2 as .dwg
When I open the File in Autocad I get Circles that are more square than round. I can't find any settings to correct this problem. If I go to Options menu in AutoCAD I see that the Arc & Circle Smoothness is set to 100 if I change this Value to 1000 it fixes the problem but I have to do it every time I open a File.
It is getting to the Point now where it is getting frustrating.
Can someone please help?
Thanks!