Cant Log in

Good morning. I'm back on Warmane after getting a new PC. I downloaded the files (I couldn't get them from the Warmane website). I added the 4GB file to the folder, changed the realmist to the Data/EnGB folder, and started the game from WoW.exe, but as soon as I enter my account information, it immediately gives me an error. What am I doing wrong? Shouldn't an installation or something be starting? Please help.

The cause depends on the exact error message.

You have been disconnected from the server. This is the message