HELP! - missing file error message "w/o this file movie can't play properly"

Here's the deal....

I use FCP for mulitiple projects at a time. Right now I am editing a huge concert dvd which has all P2 media associated it. At the end of the time when I shut off the drive for the concert dvd project and go to open up another project that has nothing to do with the concert project I get this message:

The movie file "0000324.MXF" cannot be found. Without this file, the movie cannot play properly."

It then gives me the option to "cancel" or "search". I cancel and then another one pops up. There are hundreds of clips you can imagine....I would have to "cancel all night"

What's strange is that even if the concert DVD was not the last thing that I was working on, it still prompts me for these f-ing files and the program absolutely won't open unless they are connected.

For now FCP works fine as long as that terabyte drive is attached with the media. My fear is the day that I have to return the drive.... which is coming soon.

Please help if you can.....

Rgds
lou