I'm not too familiar with that tutorial nor your particular method of
installation. In general, Open MPI needs a bunch of files to be
available on all nodes (e.g., see if you can find "mpirun" on all
nodes). See these FAQ entries:
http://www.open-mpi.org/faq/?category=running#run-prereqs
I followed the steps given here to setup up openMPI cluster :
http://www.ps3cluster.umassd.edu/step3mpi.html
My cluster consists of two nodes, master(running on fedora 10) and
compute(CentOS 5.2) node, connected directly through a cross cable.
I installed openmpi on both, there were many folders n