Hey thanx for all your help, but it still doesnt work...
These are the options/switches:
usage: vncserver [:<number>] [-name <desktop-name>] [-depth <depth>]
vncserver -kill <X-display>
I have tried all kinds of switches, -interface eth1, -interface=eth1, --interface=eth1... but i get the same answer:
New 'X' desktop is myisphostname.myispdomain:1
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/myisphostname.myispdomain:1.log