How do I get my animations to work in the vendors?

I've bought several vendors, but when I stick the animation in, they don't work.

The animation vendors work for other people. What am I doing wrong?

You mean you can't buy your aniamtions or even can't play animation when you right click on it and selected "play", "aniamtate", and so on on the pie menu?

It will play, but in stead of holding still after a few seconds, the avi starts moving.

Several of standing built- in animations attack your avatar's animation to override in some seconds by turns in world. So it is natural that your animations are overridden and move in some seconds unless you set your animations' priority to 3, or 4. Even though you set your animations' priority to 4, some parts which don't have a difference with the position of the 1st frame and a rotation angle after the 2nd frame wouldn't effect priorities you set.
To distinguish which venders or animations are wrong, just play animations (double click on the animation file and play it), and observe them in some seconds.

One odd thing is that other ppl works well. They are using AO, aren't they?

Thank you for the advice. I realize that I've been uploading my animations wrong.