After migration of a database from SQL 2000 to 2005 - i am getting this error :

Failed:(-1073548784) Executing the query "BACKUP DATABASE [eNetwork] TO  DISK = N'\\\\wffsfs202\\SQLAdmin\\epublication_backup_200906230017.bak' WITH NOFORMAT, NOINIT,  NAME = N'eNetwork_backup_20090623001742', SKIP, REWIND, NOUNLOAD,  STATS = 10
" failed with the following error: "The backup of full-text catalog 'eNetworkStoriesCatalog' is not permitted because it is not online. Check errorlog file for the reason that full-text catalog became offline and bring it online. Or BACKUP can be performed by using the FILEGROUP or FILE clauses to restrict the selection to include only online data.
BACKUP DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

Any help is appreciated. Thanks,