diff --git a/ucs-school-umc-exam/umc/js/schoolexam.js b/ucs-school-umc-exam/umc/js/schoolexam.js
index 5a783ba..78fa9af 100644
--- a/ucs-school-umc-exam/umc/js/schoolexam.js
+++ b/ucs-school-umc-exam/umc/js/schoolexam.js
@@ -642,24 +642,23 @@ define([
 			// start the exam
 			var values = this.getValues();
 			var preparationDeferred = new Deferred();
-			this.umcpCommand('schoolexam/exam/start', values).then(undefined, function() {
+			this.standbyDuring(this.umcpCommand('schoolexam/exam/start', values)).then(lang.hitch(this, function() {
+				this.standby(true, this._progressBar);
+				this._progressBar.auto(
+					'schoolexam/progress',
+					{},
+					lang.hitch(this, '_preparationFinished', preparationDeferred),
+					undefined,
+					undefined,
+					true,
+					preparationDeferred
+				);
+			}), function() {
 				preparationDeferred.cancel();
 			});
 
 			// initiate the progress bar
 			this._progressBar.reset(_('Starting the configuration process...' ));
-			this.standby(false);
-			this.standby(true, this._progressBar);
-			this._progressBar.auto(
-				'schoolexam/progress',
-				{},
-				lang.hitch(this, '_preparationFinished', preparationDeferred),
-				undefined,
-				undefined,
-				true,
-				preparationDeferred
-			);
-
 			preparationDeferred.then(lang.hitch(this, function() {
 				// everything fine open the computerroom and close the exam wizard
 				this.standby(false);