Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello,

My name is Cole while my character is named "Cantbelieve". Lately I have been having trouble with connecting/logging onto the server on the loading screen. I have been playing for about 2-3 months and I just now started to have this problem. Some details is I put my account information it loads then it says "Success!" "Handshaking" then it says "Disconnected from server". I just wanted to know what the problem could be.

Thanks,
~Cole

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Please check these two threads for assistance regarding login issues.
Common config/login errors by AverageJoe
SOLUTIONS FOR CONNECT PROBLEMS by Diametra