MOP Log In Issues

[hoobahunter]

hi there

I hope someone can help me

I just bought a MoP Beta Key and added it successfully to my battle net Account. However every time I try to log in via the Beta Client an error pops up and says that the Information I have entered is not valid ...
Logging into the battle net account managment page works without problems.

I tried almost everything, changing password, reseting password, changing e mail adress nothing works

7/20 14:43:22.797  Login program=WoW platform=Win locale=enGB
7/20 14:43:22.797  Component WoWB.Win.15882
7/20 14:43:22.811  Component WoW.base.15882
7/20 14:43:22.811  Component WoW.deDE.15882
7/20 14:43:22.811  Component WoW.enGB.15882
7/20 14:43:22.811  Component WoW.enUS.15882
7/20 14:43:22.836  Component Tool.Win.920
7/20 14:43:22.848  GRUNT: state: LOGIN_STATE_CONNECTING result: LOGIN_OK 
7/20 14:43:22.848  Connecting to 12.129.236.251:1119
7/20 14:43:23.591  GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_UNKNOWN_ACCOUNT 
7/20 14:43:23.591  Client initiated Disconnect from 12.129.236.251
7/20 14:43:23.608  GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_UNKNOWN_ACCOUNT 
7/20 14:43:23.608  Login program=WoW platform=Win locale=enGB
7/20 14:43:23.608  Component WoWB.Win.15882
7/20 14:43:23.608  Component WoW.base.15882
7/20 14:43:23.608  Component WoW.deDE.15882
7/20 14:43:23.608  Component WoW.enGB.15882
7/20 14:43:23.608  Component WoW.enUS.15882
7/20 14:43:23.608  Component Tool.Win.920

i hope someone can help me