Ok – thats the point – Yes, of course there is a reason why i use another user: my standard-account was used for tests with many different NX-versions, especially with some 4betas. Since this time there something wrong with my account – connecting to it i can enter the (right) password, but a connect did not work (error with ssh-authentication and sometimes with the host 127.0.0.1). I have removed ~/.nx, /usr/bin/NX and so on – but no success.
After a long search i found creating an additional account, it works without problems – just connection to this account and then using the screen of my standard user … so i decided not go deeper in the problem with my account…
So – then the “problem” is solved – its only a problem of my local account but not of NX … so thank you for the help!