I have a strange issue with the Calendar/Contacts from Windows Live Mail. Running this on a Windows 7 Laptop.

I am current using Windows Live Mail to access my account (own domain, not hotmail or gmail)

Recently, (Not sure what changed) all my recent events in my calendar have just disappeared, and I am only able to see older events. Similarly my contacts list has decreased in size (with about 20 missing).

Any ideas on what could have occured, and if so how I can get it back?