multiplayer problem

[xxjor]

Launcher Version: Techic Launcher- 1.0.1.3

Operating System: Windows Xp

Java Version: Version 7 Update 4

Antivirus Program: Avira AntyVir

Description of Problem:

When i launch mc by tp and when im playing singleplayer everything works almoust perfectly, but when i try to connect to the server it's impossible for me cause i cant connect no matter how many times i try

Error Messages:

Internal expection: java.net.SocketException: Connection reset, Failed to login: Bad login

Error Log:

RegisterNetClientHandlerEntity error: entityId cannot be greater than 255

[Torezu]

Update your antivirus if you haven't recently. Then post the whole log.