Adobe Premiere Elements 4.0 Trouble Uploading AVI

So I've been working on seperate projects on Adobe Premiere Elements 4.0. And I saved them also as AVI videos. So I decided I wanted to take my old projects that I saved as AVI and add them to one timeline on a project. I could have sworn I had done it like that before but for some reason, every time I go to get media, I click on the file, it shows up on the right side with just a picture of two arrows going in a circle. And when I click on it, it says "Unsupported format or damged file/One of the necessary components may not have been installed.". Now, I know that the file isn't damaged because I have played it as an AVI on my media player, and opened it as it's original project on Adobe Premiere Elements 4.0. So is there anything that I can install or do so that that I can add my video on to my timeline? Thanks

-Dan Christmas