Hi Frank,

For current situation, I'd like to suggest you recover the full-text search
resource, you must remove it and then re-create it. I have provided the
steps in my previous reply. I'd like to confirm if you followed the steps
before we go further. Thanks for your time.

I paste the steps here again for your convenience:

Remove the failed full-text search resource
======================
To remove the failed full-text search resource from your clustered instance
of SQL Server, follow these steps:
1. Start Cluster Administrator on the node that has the failed full-text
search resource.
2. Use Cluster Administrator to locate and delete the failed full-text
search resource.
3. Delete the registry keys that are related to the instance of SQL Server
where the full-text search will be reinstalled. To do so, follow these
steps.

Warning If you use Registry Editor incorrectly, you may cause serious
problems that may require you to reinstall your operating system. Microsoft
cannot guarantee that you can solve problems that result from using
Registry Editor incorrectly. Use Registry Editor at your own risk. a.
Click Start, and then click Run.
b. In the Run dialog box, type regedit in the Open box, and then click OK.

c. In Registry Editor, locate and then click the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Search\Install\Applications
d. In the right pane, delete the registry values that have the same name
as your instance of SQL Server. For a default instance of SQL Server, the
registry value is named SQLServer. For a named instance of SQL Server, the
registry value is named SQLServer$ Instance Name .

Reinstall the full-text search service
============================
To reinstall the full-text search service, follow these steps:
1. Use the Searchstp.exe program to install the full-text search service.
If the full-text search service is not installed on the computer, the
Searchstp.exe program will create it.
2. Use the Ftsetup.exe program to configure the full-text search service
and to configure the instance of SQL Server as an application that uses the
full-text search service. On SQL Server clusters, the Ftsetup.exe program
also creates the required configuration files to maintain the failover
properties for the full-text search resource. The Ftsetup.exe program uses
the following parameter options: ? ApplicationName : For a default instance
of SQL Server, the parameter value must be SQLServer. For a named instance
of SQL Server, the parameter value must be SQLServer\ Instance Name .
? User : For a local system account, the parameter value must be 0. For a
domain user account, the value of the parameter must be Domain Name \ User
Account .
? IsMasterNode : This parameter indicates whether the Ftsetup.exe program
runs on the node that owns the disk where the FTDATA folder will be
created. The parameter value must be 0 or 1.
? IsUpgrade : This parameter indicates whether the FtSetup.exe program is
upgrading the full-text search service to a later version. This parameter
value must be 0 or 1.
? IsCluster : This parameter indicates whether the Ftsetup.exe program runs
on a clustered instance of SQL Server. For a stand-alone instance of SQL
Server, the parameter value must be 0. For a clustered instance of SQL
Server, the parameter value must be 1.
? IsUninstall : This parameter indicates whether the Ftsetup.exe program
removes the full-text search service. If the Ftsetup.exe program installs
the full-text search service, the parameter value must be 0. If the
Ftsetup.exe program removes the full-text search service, the parameter
value must be 1. However, if the parameter value is 1, the values for the
IsMasterNode parameter, the IsUpgrade parameter, and the IsCluster
parameter must all be set to 0.

Re-create the full-text search resource
========================
To re-create the full-text search resource on your clustered instance of
SQL Server, follow these steps.

On the node of the SQL Server cluster that owns the disks and the resource
groups
1. In Cluster Administrator, bring the SQL Server resource online.
2. Create a command file named Installsearch.cmd to run on the node of the
SQL Server cluster that owns the disks and the resource groups. To do so,
follow these steps: a. Click Start, and then click Run.
b. In the Run dialog box, type notepad.exe in the Open box, and then click
OK.
c. Add the following commands to the text file (where Full path of SQL
Server Setup files is the path of the setup files that were used to install
the instance of SQL Server): " Full path of SQL Server Setup files
\x86\FullText\MSSearch\Search\SearchStp.exe"
/s /a:SQLServer[$ Instance name ] " Full path of SQL Server Setup
\x86\FullText\ftsetup.exe" SQLServer[$ Instance name ]
Domain name \ User account 1 0 1 0
Note For a default instance of SQL Server, remove [$ Instance name ]. For a
named instance of SQL Server, replace [$ Instance name ] with the name of
the instance of SQL Server.
d. Save the file as installsearch.cmd .

3. At a command prompt, run the following command: Full path of the
Installsearch.cmd file > installsearch.out
Note After you run the command, you must wait for the disk activities and
the network activities to stop. If the command runs successfully, a
subfolder named SQLServer$ Instance name is created in the FTDATA folder on
the shared drive.
4. Use Cluster Administrator to create the full-text search resource. To do
so, follow these steps: a. Start Cluster Administrator on the node where
the virtual server group is located.
b. On the File menu, point to New, and then click Resource.
c. In the New Resource dialog box, add a new resource with the following
properties: ? Set the value of the Name property to Full-text search.
? Leave the value of the Description property blank.
? Set the value of the Resource Type property to Microsoft Search Service
Instance.
? Set the value of the Group property to Virtual server group where the
resource will be created .

d. Click Next.
e. On the Possible Owners page, click the appropriate nodes, and then
click Next.
f. On the Dependencies page, move the SQL Server resource from the
Available Resources list to the Resource Dependencies list.
g. Click Finish.
h. Right-click the full-text search resource, and then click Properties.
i. In the Full-Text Search Properties dialog box, click the Advanced tab.
j. Under Restart, click to clear the Affect the group check box.
k. Click Apply, and then click OK.

5. Create registry values named ApplicationName and ApplicationPath for the
full-text search resource that you created in step 4. To do so, follow
these steps: a. Click Start, and then click Run.