setting custom image to slider + iphone

UIImage *minImage = [UIImage imageNamed:@"grey_track.png"];
    UIImage *maxImage = [UIImage imageNamed:@"white_track.png"];
    UIImage *tumbImage= [UIImage imageNamed:@"metal_screw.png"];
   
    minImage=[minImage stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
    maxImage=[maxImage stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
   
    // Setup the FX slider
    [maxPriceSlider setMinimumTrackImage:minImage forState:UIControlStateNormal];
    [maxPriceSlider setMaximumTrackImage:maxImage forState:UIControlStateNormal];
    [maxPriceSlider setThumbImage:tumbImage forState:UIControlStateNormal];