Tablet acting only as a second screen
I own a Kamvas Pro 13 Gt - 133 and it always worked just fine except today. I decided to use it after a while but it's only acting as a screen without letting me do anything at all. It's hard to explain; it shows me my screen but whenever I try to open photoshop it opens it on my actual monitor not on the tablet. I tried everything but there's no way of working on it on my tablet. I've tried alternating between the available working areas but one of them makes the mouse of my computer get stuck in the screen of the tablet so I can't do anything. In the other one I open photoshop but it only shows it on my monitor, not on my tablet screen.
In short I can't do anything and I don't know how to fix it.
I already tried updating the drivers and rebooting but it was to no avail.