Hi,
To enable a table for full-text indexing
1.Expand the server group, expand Databases, and expand the database that contains the table you want to enable for full-text indexing.
2.Expand Tables, and right-click the table that you want to disable or re-enable for full-text indexing.
3.Select Full-Text index, and then click Disable Full-Text index or Enable Full-Text index.
Check the following links...
How to: Disable or Re-enable a Table for Full-Text Indexing (SQL Server Management Studio)[
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Regards,
GVPrabu