MT 4 646 is giving some problem. After placing the zorro.ex4 and the key .dta file in Experts folder, and zorroMT4.dll and zorroMT4.ex4 in Libraries, and after clicking in Allow automated trading, DLL imports and external expert imports, it doesn't detect it. Even after reinitiating MT4 or trying to locate them in the metaquotes language editor to compile them.

The versión of MT4 646 I downloaded it from Metatrader.