national settings

Hello!
I am using QNX 6.3 and postgreSQL 7.3.2. I dont know how to set national
sorting (polish). I know that i need to set locale but i donno how to do
this in qnx.
I use:
mkdir ppp
initdb -E ISO-8859-2 --locale=pl -D ppp
then pg_ctl -D ppp start
and i get: FATAL: invalid value for option 'LC_MESSAGES': 'pl'

I know that there is something wrong in my locale setting, but donno
what :(. Maybe somebody use postgres under qnx and knows what to do ?
Greetings
SkiLo