Freenx nx server problem in Ubuntu Jaunty 9.04

After upgrading to Jaunty, I never managed to successfully connect to my desktop using NX. I use a windows computer with nomachine nx client. I always got an error like this:

Info: Proxy running in client mode with pid '1728'
Session: Starting session at 'Sat Jan 12 16:34:05 2008'.
Warning: Connected to remote version 3.0.0 with local version 3.1.0
Info: Connection with remote proxy completed.
Warning: Unrecognized session type 'unix-desktop'. Assuming agent session.
Info: Using ADSL link parameters 512/24/1/0.
Info: Using cache parameters 4/4096KB/16384KB/16384KB.
Info: Using pack method 'adaptive-7' with session 'unix-gnome'.
Info: Using ZLIB data compression 1/1/32.
Info: Using ZLIB stream compression 4/4.
Info: No suitable cache file found.
Info: Forwarding X11 connections to display ':0'.
Info: Forwarding multimedia connections to port '6000'.
Info: Listening to font server connections on port '11000'.
Session: Session started at 'Sat Jan 12 16:58:19 2008'.
Info: Established X server connection.
Info: Using shared memory parameters 0/0K.
Session: Terminating session at 'Sat Jan 12 16:58:19 2008'.
Session: Session terminated at 'Sat Jan 12 16:58:19 2008'.

After hours of searching the web, I concluded the problem is with the ownership and permissions of the .Xauthority file. Here’s how I fixed it:
sudo chown hydtech /home/hydtech/.Xauthority
sudo chgrp hydtech /home/hydtech/.Xauthority

and delete:
sudo rm /home/hydtech/.Xauthority-l
sudo rm /home/hydtech/.Xauthority-c

Now it works like a charm.