fighting games directionality problem

[ATGATG]

I have a 360 controller Xpadder and it works really good but Im playing a fighting game called blazblue on my pc and I find it nearly impossible to do Half circles and quarter circles.
I have no problems doing Half circles and quarter circles at all when I play the game on my 360 , any advice would be very much appreciated.

I use the left stick as the directional stick.
The setting are as follows:
right and left = x axis
up and down = y axis

thanks in advance

[Jonathan]

What happens if you use the Advanced Assignment window:



to create a sequence of Up,Up+Right,Right,Down+Right,Down?