iOS iPhone SDK Buttons not working?

[icinnamon]

My program works like this:
Press the start button, and it initializes CoreLocation.
Then you can select how often it updates - every meter, 10 meters, 100 meters, 1km, or as often as possible. So I have these methods:

- (IBAction)meter1 {
	[MyCLController sharedInstance].locationManager.distanceFilter = 1;
	loadingText.text = @"Updating every meter";
}
- (IBAction)meter10 {
	[MyCLController sharedInstance].locationManager.distanceFilter = 10;
	loadingText.text = @"Updating every 10 meters";
}
- (IBAction)meter100 {
	[MyCLController sharedInstance].locationManager.distanceFilter = 100;
	loadingText.text = @"Updating every 100 meters";
}
- (IBAction)meter1000 {
	[MyCLController sharedInstance].locationManager.distanceFilter = 1000;
	loadingText.text = @"Updating every kilometer";
}
- (IBAction)onPress {
	[MyCLController sharedInstance].locationManager.distanceFilter = 0;
	loadingText.text = @"Updating as often as possible";
}

But they are apparently not being called when I press the button (nothing happens).
Any advice? Thanks!

EDIT: And it works on the simulator, but not on the actual phone
Apparently, all the buttons freeze on the actual phone