RetrieveAuditDetailsRequest Account does not exist

I created the following code to restore some accounts that were mistakenly deleted. Everything had been working fine during my early testing, but now I receive this error for every account I'm trying to restore:

Unhandled Exception: System.ServiceModel.FaultException`1[Microsoft.Xrm.Sdk.OrganizationServiceFault]: Account With Id = c011f583-8741-e211-bce3-78e7d1622fbb Does Not Exist

Server stack trace:

  at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)

  at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)

  at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCall

Message methodCall, ProxyOperationRuntime operation)

  at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:

  at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

  at Microsoft.Xrm.Sdk.IOrganizationService.Create(Entity entity)

  at Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy.CreateCore(Entity entity)

  at OrganizationRestoration.Program.Main(String[] args)

This is the code:

while (rdr.Read())

               {

                   if (!rdr.IsDBNull(0))

                   {

                       auditId = new Guid(rdr["AuditId"].ToString());

                       RetrieveAuditDetailsRequest request = new RetrieveAuditDetailsRequest();

                       request.AuditId = auditId;

                       RetrieveAuditDetailsResponse response = (RetrieveAuditDetailsResponse)service.Execute(request);

                       AuditDetail auditDetail = response.AuditDetail;

                       var attributeAuditDetail = auditDetail as AttributeAuditDetail;

                       //create the deleted record

                       if (attributeAuditDetail != null)

                           service.Create(attributeAuditDetail.OldValue);

                   }

               }

I'm not sure what change I may have made that would cause this to stop working. Ideas?