The information you have entered is not valid

Hello!
Trying to logon to the MOP 5.4.8 and i get the classic "The information you have entered is not valid. Please check the spelling of the account name and password. If you need help retrieving a lost or stolen password and account, see ((link))".

It is the same Username and password for login onto here.

Any toughts?

Follow these steps:
1) Restart your PC
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only"

The WoW Folder is on my d-disk.
The folder is alowed to be read and driven.

have you download the client from warmane?

then be sure your password has less than 15 characters (otherwise it can not be fully insert on wow client)

I downloaded the game from warmanes page.
The password is also less then 15 characters.