bugs in Mail?

I've set up a gmail account using Microsoft exchange, every time I try to view All Mail my entire ipad freezes up. it will say Downloading at the bottom but the spinning wheel is frozen, the four/five finger gestures stop working. sometimes I can get back to the home screen when I press the home button but once I get there I can't launch any apps, when I tap an icon it becomes dimmed as usual but then it returns to normal and the app won't launch. I swipe and tap the home button randomly and after about thirty seconds it unfreezes and it goes crazy for a moment because it finally recognized all the gestures I had made while it was still frozen. another thing that sometimes happens after exiting mail is when I relaunch it, it just stays at the splash screen