How to run MPI?

Hello,
I have just install MPI in my cluster that work with openMosix.
When I run the test: ~/mpich-1.2.7p1/examples/test # make testing
it give my errors related with connection (text is at bottom).
      
What I need to do to allow mpi to run in the cluster??

Thank you.
Have a nice day.

Error messages:
spd14:~/mpich-1.2.7p1/examples/test # make testing
if [ "" != yes ] ; then \
(cd pt2pt && ./runtests  -check ) ; fi
/root/mpich-1.2.7p1/bin/mpicc -DUSE_SOCKLEN_T -DUSE_U_INT_FOR_XDR 
-DHAVE_MPICHCONF_H -DHAVE_STDLIB_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STRING_H=1 
-DUSE_STDARG=1 -DHAVE_LONG_DOUBLE=1 -DHAVE_LONG_LONG_INT=1 
-DHAVE_PROTOTYPES=1 -DHAVE_SIGNAL_H=1 -DHAVE_SIGACTION=1 -DHAVE_SLEEP=1 
-DHAVE_SYSCONF=1   -c third.c
/root/mpich-1.2.7p1/bin/mpicc -DUSE_SOCKLEN_T -DUSE_U_INT_FOR_XDR 
-DHAVE_MPICHCONF_H -DHAVE_STDLIB_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STRING_H=1 
-DUSE_STDARG=1 -DHAVE_LONG_DOUBLE=1 -DHAVE_LONG_LONG_INT=1 
-DHAVE_PROTOTYPES=1 -DHAVE_SIGNAL_H=1 -DHAVE_SIGACTION=1 -DHAVE_SLEEP=1 
-DHAVE_SYSCONF=1   -c test.c
/root/mpich-1.2.7p1/bin/mpicc  -o third third.o test.o
Failed to run simple program!
Output from run attempt was
*** Testing Unexpected messages ***
spd14: Connection refused
p0_12323:  p4_error: Child process exited while making connection to 
remote process on spd14: 0
p0_12323: (33.062972) net_send: could not write to fd=4, errno = 32
*** Testing Unexpected messages ***
mpirun program was /root/mpich-1.2.7p1/bin/mpirun
mpirun command was
/root/mpich-1.2.7p1/bin/mpirun -mvhome -np 2 ./third </dev/null 
 >>third.out 2>&1
make: *** [runtest] Error 1
spd14:~/mpich-1.2.7p1/examples/test #




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