kbdmux: unable to work with dual keyboard

[Core Dumped]

hi, guys!

I have:

1. FreeBSD coredumped.local 6.0-STABLE FreeBSD 6.0-STABLE #1: Wed Jan 11 00:31:00 MSK 2006     root at coredumped.local:/add/ftp/pub/FreeBSD/STABLE/src/sys/i386/compile/my2  i386

2. I have usb BTC 8190URF cordless kbd&mice:

Jan 12 06:04:32 coredumped kernel: ukbd0: BTC USB Multimedia Cordless Kit, rev 1.10/1.70, addr 2, iclass 3/1
Jan 12 06:04:32 coredumped kernel: kbd2 at ukbd0
Jan 12 06:04:32 coredumped kernel: uhid0: BTC USB Multimedia Cordless Kit, rev 1.10/1.70, addr 2, iclass 3/1


3. shell script (from man kbdcontrol):

kbdcontrol -K < /dev/console
kbdcontrol -a /dev/ukbd0 < /dev/kbdmux0
kbdcontrol -a /dev/atkbd0 < /dev/kbdmux0
kbdcontrol -k /dev/kbdmux0 < /dev/console

4. Output of the script:

root at coredumped:/add/home/coredumped/tmp$cat mmm.log
+ kbdcontrol -K
kbd0
    atkbd0, type:AT 101/102 (2)
+ kbdcontrol -a /dev/ukbd0
kbdcontrol: unable to (un)mux the keyboard: Invalid argument
kbd1
    kbdmux0, type:AT 101/102 (2)
+ kbdcontrol -a /dev/atkbd0
kbdcontrol: unable to (un)mux the keyboard: Invalid argument
kbd1
    kbdmux0, type:AT 101/102 (2)
+ kbdcontrol -k /dev/kbdmux0
kbd1
    kbdmux0, type:AT 101/102 (2)

Question: In result I am unable to use two keyboards.
Without kbdmux I can use only keyboard in one time.

Thank you!

Eugeny.