I'm trying to use Windows XP Movie Maker, but when I try to import an AVI video, it shows an error telling me that it wasn't import due to an the fact that the codec wasn't available (I'm able to see the video using the windows media player)

First, the error message suggested to enable the option "download codecs automatically" under "tools > options general". I did it. But know the error tells me that the codec wasn't available and, if I already installed it, I should reinitialize movie maker. I also already did it...

The error msg is:

The file D:\movie1.avi cannot be imported because the codec required to play the file is not installed on your computer. If you have already tried to download and install the codec, close and restart Windows Movie Maker, and then try to import the file again.

Any hints?