http://wiki.roblox.com/index.php?title=Animations May help
It may have failed to load in to the game if the animation is empty, if you did not upload it correctly or you uploaded it with a file not supported by roblox, this only applies if you didn't make the animation in studio with the plugin.
If you did use the plugin, then maybe it's something to do with the scripts. If you're not sure how to publish an animation however, again, I recommend going here http://wiki.roblox.com/index.php?title=Animations
I do not think it's possible for a published animation to only work on the maker, it may more likely be due to the scripting or the way it's published.
PS, I think they require you to add "?" in the titles to make sure what you're asking is a question and not random statements or requests. So even if you did ask a statement, adding the ? may make it look more like a question.
1 comment
Then how do I make it so the player doesn't nee it?