File 'sysft_pk_dnt_posts1_msg' cannot be reused until after the next BACKUP LOG operation.
Assuming a fulltext catalog named "pk_dnt_posts1_msg" in SQL2005 context is created then deleted , a catalog with the same name cannot be re-created again.
We should do the "backup" operation against current database ( just choose the type "Transaction Log" ) then recreate the samename catalog.
DNT...