pxe FreeBSD-5.3-beta4: btx halted

Hi guys,

i'm pxe-booting freebsd inside a vmware system
running on top of my freebsd box that acts 
like dhcp/tftp/nfs/etcetc server for the diskless 
(vmware) client.
vmware boots, it gets ip&c from dhcp server,
starts tftp and trasfer the bootloader but then, 
it hangs with a regs dump and the msg:
btx halted.
To see a complete regs dump and error code i made
a screenshot of it available here:

http://www.gufi.org/~flag/vmware-btx-hlt.gif

any idea would be GREATLY appreciated cause it
would be very nice to make it work... =)
(and it would help me a lot for kernel debugging... =P)

bye
-- 
Paolo

Italian FreeBSD User Group: http://www.gufi.org