runcluvfy.sh user equivalence for user "oracle" failed

$  ./runcluvfy.sh stage -pre crsinst -n node1,node2 -verbose

Checking node reachability...

Check: Node reachability from node "node2"
  Destination Node                      Reachable?             
  ------------------------------------  ------------------------
  node1                                        yes                     
  node2                                        yes                    
Result: Node reachability check passed from node "node2"

Checking user equivalence...

Check: User equivalence for user "oracle"
  Node Name                             Status                 
  ------------------------------------  ------------------------
  node1                             failed                  
  node2                             failed                 
Result: PRVF-4007 : User equivalence check failed for user "oracle"

ERROR:
User equivalence unavailable on all the specified nodes
Verification cannot proceed

Pre-check for cluster services setup was unsuccessful on all the nodes.

==================yes

I tried this

$ ssh -V
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003

$ssh node1 date
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