type...... "startx JWM"
Hi, I'm pretty sure that startx don't take any arguments.
To specify which window manager (WM), you'll need to modify /etc/sysconfig/desktop
tc@box:~$ cat /etc/sysconfig/desktop
jwm
In case it's not jwm
echo jwm > /etc/sysconfig/desktop
For a WM to be functioning, you'll need a X server. (Xvesa, Xfbdev, Xorg)
Sometimes you'll also need graphics-KERNEL extension and possibly some firmware
Since you mentioned "fresh installation", you may also need wbar and aterm
Let me sum it up:
tce-load -w Xorg jwm graphics-KERNEL wbar aterm
tce-load -i Xorg jwm graphics-KERNEL wbar aterm