What program are you using to view them with? If it's Internet Explorer, perhaps you have some ad-blocking software that is only allowing the first frame of gif animations. I know what Zone Alarm Pro has this option, and I'm sure hundreds of other programs do too. If you're opening the gif from your computer using photo editor or something, try using a different program. Some, like Adobe Photoshop and Microsoft Photo Editor, only open the first frame, whereas others, like Windows Picture and Fax Viewer, will play all frames of the gif.
make sure when you open the they arent being opened by an applicationt aht can edit the file. like paint. make sure you have your file formats for gifs like windows picture fax viewer or microsoft viewer