You mean that the SQL Server service is not showing in the Cluster resources?
I guess you didn't install it as a cluster service, then.
Try issuing this:
SELECT SERVERPROPERTY('IsClustered')
If it returns 0, then you don't have a clustered instance and someting went wrong during setup.
If it returns 1, then something is wrong with the cluster anyway.
-- Gianluca Sartori