Failed to Install Second Node in the cluster

Hi all...

I have clustered two nodes using Windows Server 2008, and I have installed SQL Server 2008 (RC0) on one of the nodes.  (I used the New SQL Server failover cluster installation).  I am having problems installing the second node.

Note:  I am able to connect to the running instance from either node using the SQL Server 2008 Mangement Studio.

On the second node, I get to the "Cluster Node Configuration" window, where the Instance name appears besides the cluster network name.  When I select "Next", the setup program closes and shows this error:

"SQL Server Setup has encountered the following error:"  "Failover instance 'TESTING' cluster group not found".

I get the same error when the firewall on both nodes are disabled or enabled.

Any ideas?

Thanks!

Forch