Can someone tell me how to post gifs? Thanks

http://tinypic.com/
Once you upload, it should give you the forum code and everything.

Ok thanks...I tried that but I think my file is too big

www.imgur.com is the supreme image hosting site

www.filesmelt.com for anything else
Once your image is uploaded, just copy the direct link url from the direct link box and paste it with tags in your forum post

When you try tinypic does it say it is too big, or does it just keep loading? Sometimes it just takes a long time to get the picture uploaded.

It says upload fail.

Yes, maybe you should try finding/making a smaller gif then. It is more than likely too large of a file.

If you try tinypic,take this as ex:

Try IMAGESHACK.. it helps you upload gifs and get the forum code

but if you use imageshack, your image quality may be worse since imageshack don't produce images that has an alpha-layered (transparent) image.
Try deviantart, imgur, or the super simple tinypic.