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 :323:START: AppInfo ComputerName: PAZ02HTP3646 Operating System: Unknown_OS PlatformID:2 6.1.7601 (Service Pack 1) Time: Mon 2017:02:20 13:02:53 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.30.1 Unattended: True Retained: True StartMode: 1 Thread: 2616 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {04FAB9CA-CABD-4927-8F0B-88FB9BCD7DAE} ContextInfo.ContextId: {2FBBFCA3-31FD-4450-9213-7A5E23D51FA9} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {9EAB623B-EC01-4D03-831D-A93D53AB4A6E} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3646 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: