Using tc2.0rc21
Thanks to robc for the tcz extension, I installed the realvnc extension and modified the xstartup file as shown below. The vnc viewer connects but flwm is not present. Also tried wbar, no worky either. There is nothing in the log file of interest.
#!/bin/sh
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
vnc4config -iconic &
flwm &