iPhone: Create several button using one function

Question

Hey guys I need to create several buttons in a app so I made this function:

- (UIButton*) SetButton:(UIButton*)boton withTag:(int)Tag andFrame:(CGRect)Frame
{
    NSArray *aux = [[NSArray alloc]init];
    boton = [[UIButton buttonWithType:UIButtonTypeRoundedRect]retain];
    boton.frame = Frame;
    boton.tag = Tag;
    aux = [[AmericaInfo objectAtIndex:Tag] componentsSeparatedByString:@" "];
    [boton setTitle: [aux objectAtIndex:KIndex] forState:0];
    boton.titleLabel.font = [UIFont fontWithName:@"Arial" size:14];
    boton.titleLabel.textColor = [UIColor blackColor];
    [boton addTarget:self action:@selector(HoldAmericaBoton:) forControlEvents:UIControlEventTouchDown];
    [boton addTarget:self action:@selector(TapAmericaBoton:) forControlEvents:UIControlEventTouchUpInside];
    [aux release];

    return boton;
}

Then If need to create a button I do this:

UIButton *a0 = [self SetButton:a0 withTag:0 andFrame:CGRectMake(1450, 200, 72, 37)];

It is not working... The code is wrong? or should I make function like initWith that returns an id?

Thanks Carlos Vargas