[expert] VNC with just gray screen - please help resolve

[Sevatio Octavio]

I'm using VNC for Linbox to Linbox.  I'm able to log in and get vncviewer to see the 
remote mouse cursor move but all I get is a
gray background with no other functions.  I've looked at "xstart" and it's set to run 
"twm".  Is there something I'm missing here?

Seve