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: PAZ02HTP3642 Operating System: Windows 2003 5.2.3790 (Service Pack 2) Time: Tue 2015:12:01 09:24:08 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 14.91.4 Unattended: True Retained: True StartMode: 1 Thread: 1828 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {A41D4170-6B61-40E6-8ECF-63B3882BA91C} ContextInfo.ContextId: {1D7A67C2-2CB2-4056-8B6C-75F23DDF6C27} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {7CA19A74-E630-4DF4-8CE6-E6A1EB08C450} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3642 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: