ZBrushCentral

Radial sym. Not working

I am having this weird problem with radial symmetry. My radial symmetry is working only in two place the one where I am placing my stroke and other is exactly behind the stroke, rest is black or very light stroke. please help

image?

got it restarted zbrush and it worked fine. thanks anyways

Moved post. It did not belong in the DIY ****pit thread. This is really the only place it fit.