[Mobhack]

Do you have an anti-virus programme - some can decide all on their own that a programme is "bad" for you. Avast(?) did that to me for the game a few years back - outlined the game window in red, and stopped it from working. It may e.g. have had a script update, so now it does work. In the case of avast, I had to find its new "feature" it had introduced in its latest update and turn it off.