anytime i walk its slows down. i can understand it slows down when the screen scrolls but it shouldn't do it when im only walking. Maby the phone cant handle it..?

Hey when the character walk somewhere I point its going super slow. But when he starts interacting with someone/something it goings in normal speed. In BS2 its moving a little faster. Feels like its laggy. I'm using HTC desire. Anyone know what's wrong? Some wrong settings or something?