diff --git a/WelsonJS.Toolkit/WelsonJS.Service/ServiceMain.cs b/WelsonJS.Toolkit/WelsonJS.Service/ServiceMain.cs
index 61f0385..fe25837 100644
--- a/WelsonJS.Toolkit/WelsonJS.Service/ServiceMain.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Service/ServiceMain.cs
@@ -334,7 +334,8 @@ namespace WelsonJS.Service
                 object[] parameters = new object[] {
                     scriptName,
                     eventType,
-                    new ArrayList(args)
+                    new ArrayList(args),
+                    args.Length
                 };
                 //scriptControl.AddObject("extern_arguments", new ArrayList(args), true);
 
diff --git a/app.js b/app.js
index daef76c..baa9859 100644
--- a/app.js
+++ b/app.js
@@ -592,8 +592,14 @@ function initializeWindow(name, args, w, h) {
     }
 }
 
-function dispatchServiceEvent(name, eventType, w_args) {
+function dispatchServiceEvent(name, eventType, w_args, argl) {
     var app = require(name);
+    var args = [];
+    
+    // convert the arguments to Array
+    for (var i = 0; i < argl; i++) {
+        args.push(w_args(i));
+    }
 
     // load the service
     if (app) {
@@ -610,7 +616,7 @@ function dispatchServiceEvent(name, eventType, w_args) {
             if (eventType in action) {
                 try {
                     return (function(f) {
-                        return (typeof f !== "function" ? null : f(w_args));
+                        return (typeof f !== "function" ? null : f(args));
                     })(action[eventType]);
                 } catch (e) {
                     console.error("Exception:", e.message);
diff --git a/defaultService.js b/defaultService.js
index f1558d4..dd3e4b2 100644
--- a/defaultService.js
+++ b/defaultService.js
@@ -21,11 +21,11 @@ function onServiceElapsedTime() {
 }
 
 function onMessageReceived() {
-	return "onMessageReceived recevied. " + args.join(', ');
+    return "onMessageReceived recevied. " + args.join(', ');
 }
 
 function onServiceScreenTime(args) {
-	return "onServiceScreenTime recevied. " + args(0);
+    return "onServiceScreenTime recevied. " + args.join(', ');
 }
 
 function onFileCreated(args) {