Error 81000314, 81000377 or 81000378: Your contact list is not available
If you receive one of these messages, your contact list is not
available or is in read-only mode. Wait a few minutes, and then try to
sign in again.
Possible Solution
\Documents and Settings\<pcusername>\Contacts\<email> and delete "
contactcoll.cache" rename "
contactcoll.cache.bak" to "
contactcoll.cache". Make sure you make another backup
.