here follow this

----http://msdn.microsoft.com/en-us/library/dd266793%28VS.90%29.aspx

Open Services Manager and start SQL Server FullText Search. If Full Text Search is not installed, install it. Then retry the installation.

1.

Click Start, click Administrative Tools, and then click Services.

Services Manager opens.

2.

If SQL Server FullText Search appears but the status is not Started, right-click the service and then click Restart.

3.

If SQL Server FullText Search is not listed, open Add or Remove Programs from the Control Panel, click Microsoft SQL Server 2005 or Microsoft SQL Server 2008, and then click Change.

4.

In the SQL Server Maintenance dialog box, click To install a new component, click here.

5.

In the Installation Media dialog box, browse to the location of the setup.exe file for your version of SQL Server.

6.

When the setup wizard launches, select FullText Search to add the missing service.

7.

To retry the installation of Team Foundation Server, on the Setup Failed page of the installation wizard, click Retry.