Sharepoint 2007 GRT backups Hung

Hi,

Need a quick fix. One of our sharpoint GRT backups hung after completing GRT processes. we have found that out of 9 DBs one DB is causing the other backups to hung. So we have created two policies one with 8 DBs in and other with the problem DB. The policy with 8 DB going fine and one DB policy still hungs  after completing GRT process. WE haave been said that Catalog process hungs this DB. What will be the fix.