first of all I should clarify that I have little knowledge, it is why I contact and of course I am willing to pay for it. My server use the chronicle Hellbound (CT1.5). And i have a problem, most people can play without problems in the server, But Some People Have trouble for open the client, when they open the l2.exe and nothing happen. (i think the chronicle is too old, maybe the problem is that with some windows version's, or the graphic card, or idk). i try with other system's from internet but nothing work. But the same people with problems in my server can logg without problems in other server ("Dragon-NetWork Server for example this server use the same chronicle) That server system have a biggest fixed's this is the system from that server https://mega.nz/#!y0BkCTyC!jozKZc_jbkz6q5YLCQY790CSr591N6oQr5Z5vh1NJ7s So i just copy that system and try to edit the l2.ini ip with my server ip and use that system, and work fine the client start fine in all pc's , loggin pass but in not pass the server selection. And the console from my server show me this error "[19/07 14:00:41] Client: [iP: 22.214.171.124] - Failed reading: [C] 2B AuthLogin ; null java.nio.BufferUnderflowException at java.nio.Buffer.nextGetIndex(Buffer.java:506) at java.nio.HeapByteBuffer.getChar(HeapByteBuffer.java:259) at com.l2jserver.mmocore.ReceivablePacket.readS(ReceivablePacket.java:122) at com.l2jserver.gameserver.network.clientpackets.AuthLogin.readImpl(AuthLogin.java:48) at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.read(L2GameClientPacket.java:47) at com.l2jserver.mmocore.SelectorThread.parseClientPacket(SelectorThread.java:456) at com.l2jserver.mmocore.SelectorThread.tryReadPacket(SelectorThread.java:391) at com.l2jserver.mmocore.SelectorThread.readPacket(SelectorThread.java:315) at com.l2jserver.mmocore.SelectorThread.run(SelectorThread.java:184)" So if someone can help me with this i can pay more than 30e just tell me if you can do something for help me with this Best Regards.