VNC Connection Timeout ?

[SicSource]

Hey everyone,

I've just installed Proxmox on a fresh Installation of Debian 7 and after some trouble of not being able to start the VMs because i haven't had added the Network Bridge. Now everything is working fine, kinda. I'm not able to use the Console of any VM since I'm always getting the same error:
no connection : Connection timed out
TASK ERROR: command '/bin/nc -l -p 5900 -w 10 -c '/usr/sbin/qm vncproxy 100 2>/dev/null'' failed: exit code 1
or
no connection : Connection timed out
TASK ERROR: command '/bin/nc -l -p 5901 -w 10 -c '/usr/sbin/qm vncproxy 102 2>/dev/null'' failed: exit code 1

I'm thankful for any help you guys may give me

Greetz
SicSource

EDIT:
After switching to Firefox and updating Java It finally worked.

 

[fireon]

EDIT:
After switching to Firefox and updating Java It finally worked.

Fine Please set your Threat to solved.
Thanks!