I made a new server banner, and when uploading to any advertising site, it stays frozen on the 'slide' it was on when I saved. Any ideas would be greatly appreciated, I spent two hours on this banner. I made multiple banners before and this never happened! Using photoshop CS6.
If the GIF exceeds the maximum length and width that the site allows, it will shrink the banner down to the appropriate size. When it does this, it breaks the GIF at the same time, so you'll have to resize the GIF for every site depending on the limits that (that) site has in place.