Hey, I'm running a Droid X with 2.2. I just bought Robo Defense after playing the free version, and I still can't upgrade my units! Every time I tap one of my guns to upgrade it, it says it the upgrade doesn't increase in power. It just says "power lvl 0 (+0)" on everything. I uninstalled, got the refund, and bought it again, and it's still doing it. I've already uninstalled the free version. How is this not working??