openmpi - initialization failed

Hi everybody,

my problem is the following:
I'm trying to run an openmpi program on a cluster (atlasz.elte.hu, it's in hungarian, but you can try google translate),
but I always got this error:

Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(394)...........: Initialization failed
MPID_Init(121)..................:
MPIDI_Populate_vc_node_ids(1219):
MPID_Get_max_node_id(798).......: PMI_KVS_Commit returned -1

I am doing it according to the manual, for example, here is my script:

#!/bin/bash

mpirun.openmpi /users/jkobori/boxfit/out/boxfit boxfitsettings.txt

which I am runnig with the sbatch -p hpc2009 -N 4 -B 2:4:1 s.sh line.
This is the way it should be done, but it doesn't work for me.
Can You help me out?

If any additional info is needed, please, tell me.

Regards,
Joe