Game does not recognize multiplayer window 2

[AllGoodNamesRTaken]

Hi, I am playing Pokemon Red Fire.gba in mGBA v0.10.3, currently I am trying to exchange Pokemons between two multiplayer windows.

I am loading a copy of the original ROM in the multiplayer window 2, and when I access the Pokemon centre and go to the exchange service on both screens everything is fine, but stays waiting for connection forever and does nothing else.

What can I do to solve this issue?

TIA