applet key press problems in diablo-jdk-1.5.0.06.00

[Ganbold]

Hi,

I'm having one chat applet problem with 
diablo-jdk-1.5.0.06.00/firefox-1.5.0.4,1 in FreeBSD-6.1-STABLE.

# uname -an
FreeBSD daemon.micom.mng.net 6.1-STABLE FreeBSD 6.1-STABLE #3: Fri Jun 
16 12:00:54 ULAST 2006     
root at gdaemon.micom.mng.net:/usr/obj/usr/src/sys/GDAEMON  i386

I use applet at http://chat.mongol.net to connect to IRC server using 
firefox-1.5.0.4,1.
In the message input area some keys such as Enter, Delete, Backspace, 
Left Arrow, Right Arrow keys aren't working.

Is this known problem with diablo-jdk-1.5.0.06.00?
I appreciate if somebody point me to the right direction.

thanks,

Ganbold