crossfader

Hi guys, i havve a problem with my Cross fader.
I've mapped it to my external controller ie stanton's scs1m. When the fader of my mixer is all the way to the b side, it does not go all the way to b in the soft. Thus the soun of the a side leaks in the b side. Is there a way to resolve this problem......
thanks in advance
I've mapped it to my external controller ie stanton's scs1m. When the fader of my mixer is all the way to the b side, it does not go all the way to b in the soft. Thus the soun of the a side leaks in the b side. Is there a way to resolve this problem......
thanks in advance