I had the same prob. All that you need to do is boot it up, set up the disk rom in the drive then RESET or RESTART and it should boot right up. If you still can not get it working I will see if I can find mine and put it on a SD and double check for you tonight.
Be more specific, which kickstart rom do you have? which game are you testing? Also which version of UAE2X are you using, IIRC the latest version didnt work at all for me as the author removed the ability to adjust the CPU speed.
Place your kickrom in the same folder as the GPE file and make sure it's the right name and ext you could compared it with the name in the readme file. Also not all games work. When you are in the menu try to load a disc like Wings of fury by first pressing the left shoulder button and then select the disc after that you should be back in the main menu. Then run it by pressing the right shoulder button.
@MrHillBilly: thanks
I had the same probs, but I didn't really care, cause I was not involved that strong in the old computer scene. You know, consoles for life .......
But with these vids, I think I'm gonna try out some R-type or so B)