downloads are lost
 

I've been using LW for over a year, and now I'm having a problem. (but only half the time?)
ALL of my downloads launch into itunes without a problem, and I can listen to them without any problems.
But, the next time I open itunes and select a downloaded file, I often receive the following message: The song "__" could not be used because the original file could not be found. Would you like to locate it?

well, I can't find it anywhere (neither can sherlock)--and it's not in the folder that it's supposed to immediately download into...whether LW is open or not.

any ideas?:confused: