using here 6.5.4-vmware-appliance

according to install instructions I set up a new virtual machine and
tried to start a side-by-side upgrade to 7.0.2

1. connect to new appliance using vmware console
2. select novell service desk
3. select migrate/upgrade
4. select upgrade from another appliance
5. entered the remote ip address
6. Appliance says: communication checks ...
7. and the process stops here :-(

What goes wrong?

Browser URL stated on console says Is this correct?
Old appliance typed the real ip-address here.

Gotthard Anger
Anwenderbetreuung Netzwerkadministration
Landeskirchenamt der EKM