iOS Table doesn't Scroll Programmatically

- (IBAction)clickAction:(id)sender
{
    [tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:NO];
    [tableView reloadData];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{		
	return 3;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{    	
	switch (indexPath.row) 
	{
		case ZERO_VALUE:
		{
			return firstCell;
		} break;
			
		case 1:
		{
			return secondCell;	
		} break;
			
		case 2:
		{
			return thirdCell;	
		} break;		
	};
}

- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath 
{	
	return UITableViewCellAccessoryNone;
}

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath 
{	
	[self tableView:tableView didSelectRowAtIndexPath:indexPath];
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}

- (IBAction)clickAction:(id)sender
{
    NSIndexPath *indexPath = [[NSIndexPath alloc] init];
    indexPath = [NSIndexPath indexPathForRow:1 inSection:0];

    [tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:NO];
    [tableView reloadData];
}