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: Fri 2016:02:05 17:00:42 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 14.91.4 Unattended: True Retained: True StartMode: 1 Thread: 5932 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {18AF5E04-6F23-4AAD-A750-84E4BC2F07EF} ContextInfo.ContextId: {0FB93EBE-7E95-449D-8243-2282A922B47D} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {60B13220-FABE-4859-ACC4-E27B043AF0D4} 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: