Viewer unable to connect to RHEL 6 VNC server

I just replaced a RHEL 5 server with a RHEL 6 server using the exact same configuration on the server and with the connection on the client. I am unable to connect through ssh to the RHEL 6 server. Though, with other VNC clients I can connect just fine.

I don’t see any relevant logs on my Mac and see on the linux server:

Feb 21 19:24:42 dexiun sshd[8496]: error: connect_to dexiun port 5902: failed

Is there a know issue with RHEL 6 and Vine Viewer? Any suggestions?

Vine viewer (or OS X?) managed to cache an error in the connection details, despite deleting the connections, etc… A reboot of the Mac solved the problem.