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 :312:START: AppInfo ComputerName: PAZ02HTP3641 Operating System: Windows 2003 5.2.3790 (Service Pack 2) Time: Mon 2015:03:30 17:13:42 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 14.70.7 Unattended: True Retained: True StartMode: 1 Thread: 3300 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {A7AE9797-3993-421D-8E22-3638ADC6F1ED} ContextInfo.ContextId: {4FEB90BA-46B3-4C3B-BBC2-D616DD6614BD} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {83DEF7E1-BBB9-4F84-84AE-9298C0165DC2} 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: