I speak for a majority of the people in saying...
YOU HAVE TO FIX THIS GAME!!! I've been having the same problem on my two computers. I used IE on my laptop (which didn't work), then I went on my Dell computer and tried IE and AOL (still didn't work). What I mean by not working is that the stupid "purchase item" button is stuck, frozen, or too busy taking a crap to notice us players who are trying to buy items for our bots.
However, there is a reason I gave this game a perfect rating. I've played your Bot Arena 2 and liked it very much and I know that if you work the kinks out on this game, it will be even better than the last Bot Arena. I hope you can figure out what is wrong soon because I really want to play it. Good luck =: )