Gba action replay help!?

Hi i just got a gba action replay from dimple records. It came with NO sticker, but it's black and when you turn it on it warns you that its not an official nintendo product, then, in the top left corner, it says action replay. Then, i go to type in a master code for pokemon emerald and it doesnt work cuz the code's too long. Anything over 2 lines doesn't work. What kind of action replay is this? And where can I find a master code only two lines long? Or how can i make it use more than two lines?PLZ HELP!!!