"Define Site" on UX400?

I'm trying to get Genera 8.3 going on my UX400; thus far I've gotten 
through the fun of getting everything running on the UNIX side and I 
have the default Genera world loading up. 

After running "Define Site," the X display shuts itself down -- the 
documentation (in the "Define Site Dialogue for a Symbolics UX" topic) 
states says this is normal.  According to the documentation the X 
display is supposed to come back automatically after this happens -- the 
problem I'm having is that it doesn't.  Lisp is still running, but 
there's no display.

If I halt the UX with "halt-ivory" from UNIX then I can get back into 
the Cold-Load display; running "continue" from the CL-Display starts 
Lisp running again, but still with no display; however at that point the 
UNIX console starts spitting out "ux400: Connection refused -- 
retrying..." every 10 seconds or so.  (ux400 is the name of the UX on 
the UNIX side of things). 

Any ideas?

Thanks in advance,
Josh