vnc not connecting

I am trying to view a remote (laptop) desktop using Hamachi and Tigervnc on my Mageia 2 Desktop.
I can see the laptop if I use Hamachi/vncserver on a Mandriva 2007 Desktop. After logging into Hamachi, using the command: 'vncviewer xx.x.xxx.xxx' (the Hamachi laptop address) I am asked for a password, and the laptop desktop appears.
I installed Tigervnc on Mageia 2 (to get vncviewer). After Hamachi connects, running 'vncviewer xx.x.xxx.xxx', Tigervnc returns "unable to connect to socket. Connection timed out." I do this as root with the firewall disabled.
Using command line: 'vncviewer listen' tells me it is using port 5500. I have tried commands such as: 'vncviewer xx.x.xxx.xxx :5900' and 'vncviewer xx.x.xxx.xxx port 5900' without success.
I have tried using KRDC (KDE Remote Desktop Client) entering xx.x.xxx.xxx (Hamachi address) to no avail.
The question is: what am I doing wrong?
I can see the laptop if I use Hamachi/vncserver on a Mandriva 2007 Desktop. After logging into Hamachi, using the command: 'vncviewer xx.x.xxx.xxx' (the Hamachi laptop address) I am asked for a password, and the laptop desktop appears.
I installed Tigervnc on Mageia 2 (to get vncviewer). After Hamachi connects, running 'vncviewer xx.x.xxx.xxx', Tigervnc returns "unable to connect to socket. Connection timed out." I do this as root with the firewall disabled.
Using command line: 'vncviewer listen' tells me it is using port 5500. I have tried commands such as: 'vncviewer xx.x.xxx.xxx :5900' and 'vncviewer xx.x.xxx.xxx port 5900' without success.
I have tried using KRDC (KDE Remote Desktop Client) entering xx.x.xxx.xxx (Hamachi address) to no avail.
The question is: what am I doing wrong?