The unsubscription is not successful.

Error message is :
:11:-2147352567:31:Method '~' of object '~' failed:0::0::11:-2147352567:31:Method '~' of object '~' failed:194:START: VBErrorInfo Description: Method '~' of object '~' failed HelpContext: 1000440 HelpFile: LastDllError: 0 Number: -2147352567 (0x80020009) Source: Agent_BUS END: VBErrorInfo :313:START: AppInfo ComputerName: PAZ02HTP3641 Operating System: Windows 2003 5.2.3790 (Service Pack 2) Time: Wed 2014:04:23 15:25:45 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 14.61.1 Unattended: True Retained: True StartMode: 1 Thread: 41348 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {98E90735-1219-4E7E-A46B-54F85451FE92} ContextInfo.ContextId: {6E03C367-F3E9-4EA6-BBDD-0D041B53C711} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {83374A27-8C30-43AF-BEEC-E11DAA95E22F} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3641 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: