[BRLTTY] Keyboard binding not work

[高生旺]

Hi

I created pc.ktb as following:

bind	KEYPAD_Eight_ArrowUp	WINUP
bind	KEYPAD_Two_ArrowDown	WINDN
bind	KEYPAD_Four_ArrowLeft	HWINLT
bind	KEYPAD_Six_ArrowRight	HWINRT
bind	KEYPAD_Five	HOME
bind	KEYPAD_Seven_Home	TOP_LEFT
bind	KEYPAD_One_End	BOT_LEFT
#end at here

Brltty: rev 4137
Kernel: 2.6.27.7-smp
Machine: Intel PC 3.0gHz
Keyboard: PS2
Start command parameter: -kpc

When I pressed keypad, the brltty seems be crashed.
Restarted it and switch to another virtule console, I can find the 
messages like this:
brltty: key=53 prs=0

Coscell