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: Thu 2016:07:28 14:06:52 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.10.2 Unattended: True Retained: True StartMode: 1 Thread: 5372 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {494186BF-D479-4B4E-933C-8DA1FAB46CBE} ContextInfo.ContextId: {5E8D42FF-BCCE-4987-B813-63F6609B310B} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {CA63FB1D-F30C-4745-9572-41E9C0DFA0A1} 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: