[Samba] Trouble doing a remote shutdown of a linux machine through samba

[Tom]

Is it possible to shutdown a Linux computer through Samba using the 
shutdown command in Windows XP and 2003? I've tried:

shutdown /r /m hostname

This doesn't work and results in Windows reporting "The remote procedure 
call failed.' in the command window. The Samba log shows the following:

------------ CLIP ---------------------------------------------------

[2006/11/07 22:20:05, 0] lib/fault.c:fault_report(36)
   ===============================================================
[2006/11/07 22:20:05, 0] lib/fault.c:fault_report(37)
   INTERNAL ERROR: Signal 11 in pid 12602 (3.0.21b)
   Please read the Trouble-Shooting section of the Samba3-HOWTO
[2006/11/07 22:20:05, 0] lib/fault.c:fault_report(39)

   From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf
[2006/11/07 22:20:05, 0] lib/fault.c:fault_report(40)
   ===============================================================
[2006/11/07 22:20:05, 0] lib/util.c:smb_panic2(1554)
   PANIC: internal error
[2006/11/07 22:20:05, 0] lib/util.c:smb_panic2(1562)
   BACKTRACE: 17 stack frames:
    #0 /usr/sbin/smbd(smb_panic2+0x8c) [0x801f6bdc]
    #1 /usr/sbin/smbd(smb_panic+0x1a) [0x801f6e0a]
    #2 /usr/sbin/smbd [0x801e0d77]
    #3 /lib/libc.so.6 [0x4023b988]
    #4 /usr/sbin/smbd [0x800f58ba]
    #5 /usr/sbin/smbd(api_rpcTNP+0x280) [0x8014c020]
    #6 /usr/sbin/smbd(api_pipe_request+0xd0) [0x8014c4b0]
    #7 /usr/sbin/smbd [0x801480dc]
    #8 /usr/sbin/smbd(write_to_pipe+0xf7) [0x80146907]
    #9 /usr/sbin/smbd [0x80053696]
    #10 /usr/sbin/smbd(reply_trans+0xac3) [0x800543f3]
    #11 /usr/sbin/smbd [0x800a6dc1]
    #12 /usr/sbin/smbd(process_smb+0x19e) [0x800a71ee]
    #13 /usr/sbin/smbd(smbd_process+0x159) [0x800a81e9]
    #14 /usr/sbin/smbd(main+0x949) [0x80284139]
    #15 /lib/libc.so.6(__libc_start_main+0xc6) [0x40227d06]
    #16 /usr/sbin/smbd [0x8003b9d1]

-------------- END CLIP ---------------------------------------------

I'm using Samba 3.0.21b on a Slackware 9.1 install. I've also tried 
using this command to shutdown/restart a Samba 3.0.23c server running on 
Slackware 10.1 with the same results.

Any suggestions would be greatly appreciated. Does Samba allow for this 
at all?

Regards,

Tom