diff --git a/tools/cooja/java/org/contikios/cooja/Cooja.java b/tools/cooja/java/org/contikios/cooja/Cooja.java
index 34ff20195..c131e3e22 100644
--- a/tools/cooja/java/org/contikios/cooja/Cooja.java
+++ b/tools/cooja/java/org/contikios/cooja/Cooja.java
@@ -1023,7 +1023,7 @@ public class Cooja extends Observable {
 
           int pluginType = pluginClass.getAnnotation(PluginType.class).value();
           if (pluginType != PluginType.SIM_PLUGIN && pluginType != PluginType.SIM_STANDARD_PLUGIN
-        		  && pluginType == PluginType.SIM_CONTROL_PLUGIN) {
+        		  && pluginType != PluginType.SIM_CONTROL_PLUGIN) {
             continue;
           }
 
diff --git a/tools/cooja/java/org/contikios/cooja/plugins/ScriptRunner.java b/tools/cooja/java/org/contikios/cooja/plugins/ScriptRunner.java
index 4e3be7297..bce5764e6 100644
--- a/tools/cooja/java/org/contikios/cooja/plugins/ScriptRunner.java
+++ b/tools/cooja/java/org/contikios/cooja/plugins/ScriptRunner.java
@@ -274,10 +274,14 @@ public class ScriptRunner extends VisPlugin {
     if (script != null) {
       updateScript(script);
     }
-    
-    /* start simulation */
-    simulation.setSpeedLimit(null);
-    simulation.startSimulation();
+  }
+
+  public void startPlugin() {
+	/* start simulation */
+	if (!Cooja.isVisualized()) {
+	  simulation.setSpeedLimit(null);
+	  simulation.startSimulation();
+	}
   }
 
   public void setLinkFile(File source) {