login problems on my MAC Pro

My Mobile account borge@tottrup.dk account work OK.  It is a premium account.

2 days ago I got my premium account borge@tottrup.dk to work.

after I log out I could not login again. the system tell me, an other have my account.

I am really tired of your system. I can login on my free system but not the premium system

I think that in beginning there was make a mix between the 2 systems

May be if you delete mix free account it will work on my premium system.

dont delete my premium system . I have used a lot of time on my portfolies.