I have WLM at work. All of a sudden only recently sent emails are in my sent folder. All of my others are gone and I am going to be in a world of trouble as these are VERY important emails.  However, I went to Start, Search and put in WLM and some mail was there.  I don't understand where my old emails are or why they are no long in the Sent folder.  Does anyone have a clue how to fix this.  It is an IMAP account.