ZBrushCentral

Heeelllpp! my ztool is totally invisible

ive been working on this object for weeks now and all of a sudden idk what happened but my object is totally invisible…ive been trying for 4 days to make it visible…the only way i can see it is if i go on to another subtool and turn on transparency and i can see my object as if he was a dead ghost… im very fustrated with the way this program flickers so much too when i try to go into brush,alphas or any of them on that side there… it just flicks off and on when i put my pen over them…its like i have to play catch just to grab a brush…im tired of having to use my mouse just to switch brushes because this darn thing keeps flickering itself on then off as soon as i go to grab a brush. its ridiculous is there anyway to fix that…right now please help me find out how to get my object visible again so i can get to work on it thanks

nevermind… seems that i need to update my graphic driver …after that it displayed