popViewController works on one view, not another

I have a couple of UIViewControllers and related nib files. I can call either of them from another UIView controller ("Sta开发者_如何学JAVArtController") by pressing a button for each one. Each of the called UIViewControllers had a button which I've connected up to a related method which pops the view off the stack, like so:

[self.navigationController popViewControllerAnimated:YES];

The methods for both are coded in the their respective implementation classes, like this:

    - (IBAction) validateEntries{

            // some validation goes here        

            [self.navigationController popViewControllerAnimated:YES];
}

and this:

-(IBAction) returnToStart {

    NSLog(@"returnToStart method called");
    [self.navigationController popViewControllerAnimated:YES];

}

They both have the methods declared in their respective interface files:

-(IBAction) returnToStart;

and

-(IBAction)validateEntries;

And the buttons in the nibs are connected to these respectively via the "touch up inside" event. The first one works fine, but the second doesn't - it doesn't even call the method. I don't get what could be causing this. Any ideas?

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sounds like you dont actually have the button hooked up to the right method inside IB if the method isnt ever being called