Problem dropping full-text catalog

Can someone help me out, when I try to drop a full-text catalog I get the following error.

TITLE: Microsoft SQL Server Management Studio

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Drop failed for FullTextCatalog 'KnowledgeBase'. (Microsoft.SqlServer.Smo)

ProdName=Microsoft+SQL+Server&ProdVer=9.00.3042.00 EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText EvtID=Drop+FullTextCatalog&LinkId=20476

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ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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Full-Text Search is not enabled for the current database. Use sp_fulltext_database to enable full-text search for the database. The functionality to disable and enable full-text search for a database is deprecated. Please change your application. (Microsoft SQL Server, Error: 7616)

ProdName=Microsoft+SQL+Server&ProdVer=09.00.3080 &EvtSrc=MSSQLServer&EvtID=7616&LinkId=20476

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