Auto it click exception: access violation reading 0x00000083

My code should open a window from taskbar and then click a control from it. The problem is that after it opens the window I get the error : "exception: access violation reading 0x00000083".I am new to Python (and in programing) and I have no ideea what that means or how to solve it.My code looks like this : import autoit, time autoit.win_activate("KOPLAYER 1.3.1040") time.sleep(2) autoit.mouse_click(131, 507) It opens (activates) the window but after that I get that exception error.