Due to a glitch with my ISP, I lost 5 months of deleted emails while working on someone else's computer using my ISP's webmail system.  Usually, I access my email through WLM on my computer, using an IMAP server with the ISP.  However,I found the emails still existed on my computer in the folder C:Users logon AppDataLocalMicrosoftWindows Live Mail. I took my computer offine and created a folder with all the deleted emails in it and  I would like to be able to restore these emails.  How do I do so?  When I tried to import them through WLM, I get the following error message:

As far as I can see, no other application is using the file I created but WLM doesn't seem to recognize them.  Any ideas?