Scrollview doesn't remains on same place

Question

I have added some UIButton in scrollveiw and linked it up with page control but when I tap my button so my pages control automatically scroll to page 1 which is initial page. So how can I erradicate this problem.

After TouchUp inside event it comes in this delegate function - (void) scrollViewDidScroll: (UIScrollView *) aScrollView

and move it to 1st index. Function implemented above.

- (void)viewDidLoad {
    [super viewDidLoad];


    scrollView = [[[UIScrollView alloc] initWithFrame:CGRectMake(32, 110, 261.0, 290.0)] autorelease];
    scrollView.contentSize = CGSizeMake(NPAGES * 320.0f, scrollView.frame.size.height);
    scrollView.pagingEnabled = YES;
    scrollView.delegate = self;
    self.scrollView.showsHorizontalScrollIndicator = NO;

    for (int i=0; i< 10; i++) {

    UIButton *mybtn = [UIButton buttonWithType:UIButtonTypeCustom];
    mybtn.frame = CGRectMake(i * 320.0f+15, 0.0f, 231.0f, BASEHEIGHT);
    mybtn.backgroundColor = [UIColor clearColor];
    mybtn.tag = i;
    [IINbtn addTarget:self action:@selector(websites:) forControlEvents:UIControlEventTouchUpInside];
    [scrollView addSubview:mybtn];
    [scrollView bringSubviewToFront:mybtn];
    }
}


- (void) pageTurn: (UIPageControl *) aPageControl
{
    int whichPage = aPageControl.currentPage;
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3f];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    scrollView.contentOffset = CGPointMake(320.0f * whichPage, 0.0f);

    [UIView commitAnimations];
}

- (void) scrollViewDidScroll: (UIScrollView *) aScrollView
{
    //id sender;
    //  UIButton *btn = sender;

    CGPoint offset = aScrollView.contentOffset;
    pageControl.currentPage = offset.x / 320.0f;

}