Problem by Installing a PVMCluster (rsh Problem ?)

[Bernd_Wollny]

hello, 
I try to install a PVM/Cluster but I have a problem that I can't add 
an other host.
%pvm
pvm> add naomi
0 successful
                    HOST     DTID
                   naomi Can't start pvmd
pvm>

 
If I start pvm with strace I get this message 
[pid  xx] execve("/bin/rsh", ["/bin/rsh", "naomi", "$PVM_ROOT/lib/pvmd" 
  ...
  [/* 51 vars */]) = -1 EPERM (Operation not permitted)

The problem are that /bin/rsh are setuid root.

How can I solve this problem?
I have tried to solve the problem on
  RedHat extreme Linux 
  RedHat 5.1  
  SuSE 5.2

The pvmbook tells my nothing about this Problem. 

greetings
  Bernd Wollny 

P.S: sorry I don't write often in English :-)