Problem Resizing Jpegs

iu.addParam("FilesPerOnePackageCount", "1");

iu.addParam("MaxFileCount", maxFileCount);

iu.addParam("MaxFileSize", maxFileSize);

iu.addParam("MinImageHeight", "1");

iu.addParam("MinImageWidth", "1");

//upload thumbnail settings

iu.addParam("UploadThumbnail1CopyExif", "true");

iu.addParam("UploadThumbnail1CopyIptc", "true");

iu.addParam("UploadThumbnail1JpegQuality","90");

iu.addParam("UploadThumbnail1FitMode", "Width");

iu.addParam("UploadThumbnail1Width", "600");

iu.addParam("UploadThumbnail1FallbackMode", "SourceFile");

In Java version, when I have gifs, pngs and jpeg in the same folder( My pictures). The jpegs are not resized properly. It always resizes to 160x120 size. The png and gifs upload the actual size which is right. I just want to resize jpegs.

When I remove all the gifs and pngs from the folder I am uploading then the jpegs upload fine. Any info would be helpful.

Thanks