Don’t know which version of PS or IR you have but usually the problem is you shouldn’t “save as” but “export as gif”. My program is in Spanish so I’m not even sure those are the proper names. :/
I have “Export” here, but not “as gif”. But I found something else (thanks to you) and it, most probably, works. I tried to put it on tumblr (to my queue) and it moved (hallelujah!), but when I clicked on it to see the whole version, well.. it stoped moving. This is gonna be a long night.
But thank you very very VERY much for your help.