iOS Having problems with select

[drf1229]

My current project looks like this:

//
//  ViewController.h
//  PercentFinder
//
//  Created by Danny Flax on 6/21/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface MyViewController : UIViewController <UITextFieldDelegate>{
	IBOutlet UIButton *Solve;
	IBOutlet UITextField *A;
	IBOutlet UITextField *B;
	IBOutlet UITextField *C;
	IBOutlet UILabel *Answer;
	IBOutlet UILabel *AnswerPercent;
	IBOutlet UILabel *Answer2;
}

-(IBAction)Solve:(id)sender;


- (IBAction)textFieldADoneEditing:(id)sender;
- (IBAction)textFieldBDoneEditing:(id)sender;



@end




//
//  ViewController.m
//  PercentFinder
//
//  Created by Danny Flax on 6/21/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"
#import <stdio.h>
#import "PercentFinderAppDelegate.h"
@implementation MyViewController






- (IBAction)textFieldADoneEditing:(id)sender
{

	[B select:(id)sender];
		
}

- (IBAction)textFieldBDoneEditing:(id)sender
{
	
	[C select:(id)sender];
	
}

-(IBAction)Solve:(id)sender{
	
	
	
		NSString*as=[A text];
	float a=[as intValue];
	NSString*bs=[B text];
	float b=[bs intValue];
	NSString*cs=[C text];
	float c=[cs intValue];
	float d=((-1*b)+sqrt((b*b)-4*(a*c)))/(2*a);
	float e=((-1*b)-sqrt((b*b)-4*(a*c)))/(2*a);
	printf("%f and %f\n",d,e);
	 
	
	[Answer setText:[NSString stringWithFormat:@"%f and %f",d,e]];
		
		

	
	
	
}


@end

For some odd reason, every time I run the IBaction textfieldBdoneediting instead of selecting text field C, it deselects everything and hides the keyboard. I have no clue what the problem is, but if anybody could help, I would appreciate it. (I'm a beginner at -C so please try to use little words )