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: PAZ02HTP3643 Operating System: Windows 2003 5.2.3790 (Service Pack 2) Time: Sun 2015:08:30 08:50:11 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 14.80.1 Unattended: True Retained: True StartMode: 1 Thread: 5676 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {CA7ADC0D-488C-4244-8543-BF357599E0EF} ContextInfo.ContextId: {E9FA9399-80BB-46A6-8F83-ADAB37B29BA1} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {D0376AA0-E71A-4446-91D3-631C9B219898} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3643 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: