diff --git a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
index e4d7fd05..2b72d6a7 100644
--- a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
+++ b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
@@ -1000,7 +1000,7 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                     var row = _dataTable.NewRow();
                     //application information read from configuration
                     row[Resources.StrTableAppName] = meterApp.AppName;
-                    row[Resources.StrTableAppId] = MeterFwUpdate.ConvertAppIdToString(meterApp.AppId);
+                    row[Resources.StrTableAppId] = MeterFwUpdate.ConvertAppIdToString((Byte)meterApp.AppId);
 
                     _dataTable.Rows.Add(row);
                 }