Gnutella Forums - Where did my file go???

I was downloading a Video. It was about 45% done when I shut down last night. Today, when I opened Limewire, a window came up saying something about not being able to save file to folder. Something about creating a new folder. I clicked ok not knowing what the heck it meant. I have been downloading this movie for about a week and a half. Not much bandwidth being offered by the person with the file. Anyhow, when I looked at the "Progress" after I got rid of the window I just mentioned, it said it was downloaded 100%. I clicked the movie and a window came up saying there was nothing to preview. The file just emptied out and was nowhere to be found. It was not in the recycle bin and I ran a search on my hard drive and it wasn't there! Where did it go? It was a week and a half of downloading down the drain. Can't figure out why all of a sudden the file could not be saved to the folder it has been in for a week and a half.
thanks for your help.