Before you ask,yes i patched WLM 3 times,i entered right username and right password
but it gives me error 

''Your contact list is currently unavailable, please try again later.''

Error code : 84cc0020

how do i fix this?

I have same issue

According to the MSN Messenger debug log, my account  successfully authenticated with the Escargot server and briefly reached the “Connected” state. However, during contact list loading, the server profile contained the flag 

ABCHMigrated: 1

, instructing the client to use the new Address Book Clearing House (ABCH) service. Because Escargot’s ABCH implementation is not yet complete, it fails to provide valid contact data. This causes the local contact store to fail initialization with internal error 

0x81000378

. That failure triggers the client to disconnect, ultimately presenting error code 

84cc0020

 (0x84cc0020) to the user. The critical log lines are:

Local store incomplete: 0x84cc0020 (no ab)

Contacts store startup failure: 0x81000378


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