ExecuteMultipleRequest does not update all record

Hi, I'm using ExecuteMultipleRequest to update some records through custom workflow, but it does not udpate all records, i.e. update only 100/1000 records only. The workflow stop without any error messages. I'm using the following code.

   ExecuteMultipleRequest requestWithResults = new ExecuteMultipleRequest();
 private void UpdateEmployeeNumber(IOrganizationService crmService, ITracingService traceService, CodeActivityContext executionContext, int intPageNumber, int intFetchCount, string strADPath, string strUserLists)
        {
            ExecuteMultipleResponse responseWithResults = null;                    

            var fetchXml = Helper.CreateXml(strUserLists, null, intPageNumber, intFetchCount);

            var fetchExpression = new FetchExpression(fetchXml);

            requestWithResults.Settings = new ExecuteMultipleSettings()
            {
                ContinueOnError = true,
                ReturnResponses = true
            };

            var entityCollection = crmService.RetrieveMultiple(fetchExpression);

            requestWithResults.Requests = new OrganizationRequestCollection();

            foreach (Entity systemuser in entityCollection.Entities)
            {
                FindEmployeeNumber(systemuser, strADPath, traceService);
            }

            if (requestWithResults.Requests.Count > 0)
            {
                crmService.Run(traceService, () =>
                {
                    responseWithResults = (ExecuteMultipleResponse)crmService.Execute(requestWithResults);
                });
            }

            if (entityCollection.MoreRecords)
                UpdateEmployeeNumber(crmService, traceService, executionContext, ++intPageNumber, intFetchCount, strADPath, strUserLists);
        }