When SQL Server connects to a Cluster Server through the Cluster Administrator, you receive:
An error occurred attempting to read properties for the "Microsoft Search Service Instance" resource type.
Invalid Class String
Error Id -2147221005(800401f3)
NOTE: The resource type may be different in your environment.
This error results from a missing DLL in the %systemroot%\Winnt\Cluster folder, like Gathercl.dll, or from not having sufficient permissions to access the folder.
To workaround this problem:
1. If %systemroot%\Winnt\Cluster\Gathercl.dll is not present, copy it from the Service Pack file, or the SQL server CD-ROM.
2. Register the Gathercl.dll file, using Regsvr32 /S Gathercl.dll.
3. Make sure that the logged on account has Full Control permission on the %systemroot%\Winnt\Cluster folder.