Images does not work as .gif

[ytt]

most of my theme images are .gif but unless i upload as .png it dont work and when i upload as .png it doesnt function the way it suppose to... example collpase.gif is for collapsing category and when i upload this as .png it shows image as staionary any idea?

adminads.com   url incase need.

[SunDi3yansyah]

this work

Source Link
http://adminads.com/images/spinner_big.gif

[ytt]

I'm refering to http://gyazo.com/f9e58e70a4910a3bda1baf7a8216d3e5 the collpase minus and plus