Client: X2go 3.99.1.0 on Win 7, no Firewall or AV installed

Server: Ubuntu server 11.10, Gnome desktop

Client appears to connect, X2go panel is displayed, random desktop background is displayed, then client hangs.

Able to successfully login via putty to port 22

Client message window:

NXPROXY - Version 3.4.0

See http://www.nomachine.com/ for more information.

Info: Proxy running in client mode with pid '3024'.

Session: Starting session at 'Tue Feb 21 14:28:02 2012'.

Info: Connecting to remote host 'localhost:31001'.

Info: Connection to remote proxy 'localhost:31001' established.

Warning: Connected to remote version 3.5.0 with local version 3.4.0.

Warning: Consider checking http://www.nomachine.com/ for updates.

Info: Connection with remote proxy completed.

Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming agent session.

Warning: Failed to read data from the X auth command.

Warning: Generated a fake cookie for X authentication.

Info: Using LAN link parameters 1536/24/1/0.

Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_32'.

Info: Not using NX delta compression.

Info: Not using ZLIB data compression.

Info: Not using ZLIB stream compression.

Info: Not using a persistent cache.

Info: Forwarding X11 connections to display 'localhost:0'.

Session: Session started at 'Tue Feb 21 14:28:02 2012'.

Info: Established X server connection.

Info: Using shared memory parameters 0/0K.

Warning: No data received from remote proxy within 30 seconds.

Error message panel (image):

Any help would be appreciated.

Michael