How to fix poke transporter gb error in emulator

[LOLcoder]

So I'm trying to get my Pokemon all over the gens of pokemon only using emulators but I've hit a roadblock on the first day when I use poke transporter gb so I can transfer my Pokemon from gen2 to gen3 on mgba for some reason it doesn't work but actually everything is going fine except for when it's transferring time they tell u to press a when ur ready BLA BLA BLA well I've done everything they said but they that the game boy color was disconnected for some reason and in the tab of the pokemon gold they say that ur friend is not connected what can I do I really want to do this challenge so I would really appreciated any help that would actually help me