Only one instance in a RAC will start at a time

All:
I have a 4 node Oracle RAC running on RHEL AS 4 64 bit. 10.2.0.1 64 Bit
This DB was running just fine last week.
Now all of a sudden only one instance will start.
In the alert log I get an ORA-1102
crsctl shows everything good
srvctl show all node apps running
srvctl shows all ASM instances running
When the second instance starts the alert log shows the reconfiguration taking place.
Then the second instance will die after getting an ORA-1102.
I have tried deleting and re-adding all the instances with DBCA.
ocrcheck comes back fine on all nodes.
I have another RAC on the same set of HP Blades that is still hunky dorey so I don't know what is going on.
Please help.

Hi,
check the value of cluster_database parameter
it should be TRUE on all instances, also post ur alert log and trace file.
Thanks
Kuljeet

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