Resizing animated gif
 

What program do I have to use to succesfully resize an animated gif? I've tried using MS Photo Editor, but after the edit the animation won't work anymore.

You're probably just not exporting it as the correct file format (animated gif) after resizing it. Either that or photo editor doesn't support animated gifs (most likely).

Either way something like irfanview should work.

I tried irfanview, but now the problem is that I cannot resize the animation while it's runnin.,If I stop the animation I cannot turn it on after resizing.

You have to resize every frame of the animation and completely re-do the gif, idiot

i use JASC Animation Studio