Need Help - SS20 Solaris 9 - SX (cg14) Graphics

So I know this is antique hardware, but I dusted off my SS20 recently and
did a fresh install of Solaris 9.
The system is configured with 2 x 200Mhz Ross RT626 cpus, 448mb RAM and an
8mb VSIMM for the SX graphics.

My Solaris 9 media is the 2002 original media kit and I applied the latest
9_Recommended patch cluster.  Also applied the mandatory Gnome 2.0 patches
(for the Gnome distro on the Contrib CD) and a few others.

I've also installed a lot of stuff from the CSW archives from the /current
tree.

Problems -

I'm playing around with various window managers and combinations of apps
that works best on this beast.  Try as I might I can't get many of the
alternative window managers to fire up.  I'm using the SX graphics obviously
and experimenting with both 8 and 24bpp.

1.  CDE - Works fine
2.  fluxbox (from CSW) - Works fine
3.  xfce4 (from CSW) - Starts but will eventually kill the Xserver and
aborts back to the dtlogin screen
4.  windowmaker (from CSW) - I can get it to start 1 out of 3 tries, but it
quickly dies and aborts back to the dtlogin screen.
5.  windowmaker (from Sol9 Contrib CD) - Same as 4.
6.  enlightenment (from CSW) -  Immediately dies and aborts back to dtlogin
screen.
7.  Gnome2 (from Sol9 Contrib CD) - Same as 3.