first off did Gcos even boot up? If so your in good shape, I have modded several cubes and the main thing people look over is "Adjusting the pot" and "Correct Media" At first i just though there were the "Hardcores" but after the first couple cubes i realized that box is pickier about its media than i am with my food!
First off the most successful media that i can get to play on all of the cubes is "Ridata(Ritek)" get that media give it a try if still fails you need to adjust the pot (search it and you will find tutorials on it and just keep playing with it, screw what others say about a particular range if your over 300ohmz just keep mking slow turns and then testing till it does work.
