Xcode: ScrollView & image array - xcode

Question

I have an array with images presented in a scrollView. It works perfectly on the simulator however when i run it on the actual device (1st gen iPad) it crashes. At first i lowered the quality of the images to the lowest possible (<120kb each) but that didn't solved my problem. Then i reduced the number of images from 13 to 6 and it works. Is there any work you can think of?
Below is the code i use:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
images = [NSArray arrayWithObjects:[UIImage imageNamed:#"back1.jpg"], [UIImage imageNamed:#"back2.jpg"], [UIImage imageNamed:#"back3.jpg"], [UIImage imageNamed:#"back4.jpg"], [UIImage imageNamed:#"back5.jpg"], [UIImage imageNamed:#"back6.jpg"], [UIImage imageNamed:#"back7.jpg"], [UIImage imageNamed:#"back8.jpg"],[UIImage imageNamed:#"back9.jpg"],[UIImage imageNamed:#"back10.jpg"],[UIImage imageNamed:#"back11.jpg"],[UIImage imageNamed:#"back12.jpg"],[UIImage imageNamed:#"back13.jpg"], nil];
pageControl.numberOfPages=images.count;
for (int i = 0; i < images.count; i++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
subview = [[UIImageView alloc] initWithFrame:frame];
subview.contentMode = UIViewContentModeScaleAspectFit;
subview.image = [images objectAtIndex:i]; //problima sthn eikona
[self.scrollView addSubview:subview];
}
pageControlBeingUsed = NO;
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * images.count, self.scrollView.frame.size.height);}