lathe arcs

I am in need of some help. I am doing lathe work on my cnc converted
Hardinge hlv-h lathe. I am making forming rollers for specialized sheet
metal shapes. The first sets of rollers were strictly angular flats and
angles. The next stages require arcs (fillets). I cannot get my machine
to cut the arcs. It machines all of the flats and angles perfectly but
does weird things when it gets to the arcs. The drawings and gcodes are
Vector 8.2 generated. I even went back and altered a previous BobCad
drawing(which was used to make the previous rollers without problem)
with some fillets. Same type of problem. I have been working on this for
several long frustrating days. I have talked with Fred and tried some
things and emailed Doug and tried doing it with relative coordinates
which did result in some arcs but still not accurate to the drawing. I
am using CNCPro as a control program. I have tried drawing in different
quadrants, all manner of different things- all wrong. This is probably
something really simple as far as setup(to the experienced operator) but
I just haven't found it yet. I made up a pen holder to draw the tool
path on the lathe and have gotten some rather unusual shapes. Fred and
Doug have been very helpful but it is the weekend and I am desperate.