H6950P tablet not working properly

hello, recently i started having some problems with my tablet. I have the tablet for a month now and suddenly the pen started lagging. The thing is when I move the pen close to the surface of the tablet it doesn't seem to sense it, only when i touch the pad after a few strokes of the pen it sees it. it's very annoying and hard to work with if i don't know where on the screen i am with the pen if not touching. i restarted my computer, i reinstalled my drivers and i don't know what to do. i'd appreciate your help with my issue