LoginServer : Serializer error

[sxeroot]

OK so when the characters for the account "aatest" aka id "50970" are not 2 i get a serializer error before reaching the server selection screen, tried to change the character count field in the accounts table same result.
I tried to create another account and added a character to it but it didnt load on character screen when i logged on that account.

[sxeroot]

The error is "$4[net 20:38:03.141] AuthClientImpl: serializer size mismatch"

[yanlong-li]

You need to choose a matching version of the client, such as 3.0.3.0 or 1.0.1406.