Export Error

Hi,

Can anyone tell me what is this error related to ?

System.Runtime.InteropServices.COMExceptionSystem.Runtime.InteropServices.COMException (0x80040FA0): Notes error: You are not authorized to perform that operation
   at Domino.IDocument.Remove(Boolean bForce)
   at Microsoft.IdentityManagement.MA.LotusDomino.Core.Person.Delete(CSEntryChange csentry, Context exportContext, List`1 listChangeResult)
   at Microsoft.IdentityManagement.MA.LotusDomino.Core.Person.ExportEntry(CSEntryChange csentry, Context exportContext, List`1 listChangeResult)