Thank you for the swift reply, of course you know better and you were right,
apparently it was a stupid reason, MQ was taking part of the domain name and not the full domain, thus the error.
For som ...
Hello, I installed MQ 7 on windows server 2003 installed on VMWare using Vm player v 4, first without proper configuration of Domain Controllers and stuff (I did not use the wizard). And I could work ...