I wait in the queue when the server is full and after a few seconds of waiting I get disconnected from server. I have tried a few times now but everytime I get disconnected from server. I have entered my password correctly cause I can change realms and play on a different realm, but cant play on the realm i usually play on.
all that means is your realm server is down. It happens every now and then. It will probably be back up in like 30-60 minutes. you can check your realm status at worldofwarcraft.com if you want to see if that really is the problem too.