[CentOS] X2go server on Centos7, any success?

Folks

I have been unable to get X2go to work on a Centos 7 server.  I have 
tried both the out-of-the-box GNOME desktop and the Xfce as well.

In both cases, the view from the client is that the screen starts to 
appear, then goes away.  On the server, I see the following messages 
in /var/log/messages (I have erased the user name and replaced it 
with XXX).  The server is running as a virtual machine on a Win7 
system (using VMWare), and the "YYY" mentioned below is the Win7 
user.  "Goat" is the name of the server.



Oct 31 13:10:45 goat systemd: Starting Session 71 of user XXX.
Oct 31 13:10:45 goat systemd-logind: New session 71 of user XXX.
Oct 31 13:10:45 goat systemd: Started Session 71 of user XXX.
Oct 31 13:10:48 goat /usr/bin/x2gostartagent: successfully started 
X2Go agent session with ID XXX-57-1414786247_stDXFCE_dp32
Oct 31 13:10:52 goat /usr/bin/x2gosetkeyboard: Setting X keyboard 
according to /home/XXX/.x2go/C-XXX-57-1414786247_stDXFCE_dp32/keyboard
Oct 31 13:10:52 goat /usr/bin/x2gomountdirs[8612]: successfully 
mounted 
YYY at 127.0.0.1:30026/cygdrive/C/Users/YYY/X2GO~1/S-704D~1/spool to 
/tmp/.x2go-XXX/spool/C-XXX-57-1414786247_stDXFCE_dp32
Oct 31 13:10:52 goat /usr/bin/x2goruncommand: launching session with 
Xsession-x2go mechanism, using STARTUP="xfce4-session"
Oct 31 13:10:53 goat /usr/bin/x2goumount-session[8931]: successfully 
unmounted "/tmp/.x2go-XXX/spool/C-XXX-57-1414786247_stDXFCE_dp32"


As you can see, this particular run was using Xfce.

I would appreciate guidance, and yes, I have read the "manual", and 
also at least one "howto" specific to Centos 7.

The version of the x2go server is

[root at goat log]# rpm -qa | grep x2go
x2goserver-4.0.1.18-1.el7.x86_64
x2goagent-3.5.0.27-1.el7.x86_64
x2goserver-xsession-4.0.1.18-1.el7.x86_64
[root at goat log]#

the X2go client on Win7 works just fine with my Centos6 and Debian 
servers.  I found no way to capture the commentary produced by the X2go client.

David