brush strokes disappear

I just installed Harmony 14 and when I use the brush tool the stoke disappears as soon as I let go of the mouse button. It works fine on other machines but not on my laptop. The pencil tool works fine as well as the elipse, box etc. Just the brush strokes disappear whether the layer is bitmap or vector, in camera or drawing view. Any help would be appreciated.

Nevermind, the brush setting was set to repaint. It works now.