Hello again, i deleted the realmlist.wtf and i get the DC message, when i put back the realmlist.wtf the message is user name is invalid.... for sure i know mine account is type in properly.
I notice that if i change the realm list to 'set realmlist exwow-serv.exnw.com iam able to login without problems.
So i think mine account needs to be upliftet.