Linking physical GBA to Dolphin 4.0

[jAquaD]

I have this Mayflash GC to PC adapter which works perfectly fine with Dolphin for both GC controllers; both inputs work for both of my controllers. I have a GBA-GC link cable, but it doesn't seem to be recognized by Dolphin. I tried going in to config, changing socket 2 to GBA, nothing. Has anyone had any success using the GBA-GC link cable on Dolphin? Main reason is to connect my physical sapphire cart to Colosseum iso.