I am using QT 4.4.3

I have built one QT application which uses some images,Few of images are in PNG format and few are in GIF format.

When I compile my EXE in release mode and ran it,it was displaying all images.

Now when I moved this exe and Image folder to other PC to test ,it does not display a single GIF image,Only PNG images are being dislayed

if I convert GIF to PNG ,its displaying that image.

But I cannot convert all images to PNG format as its contents are altered .

What is solution for this??