diff --git a/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java b/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
index 0a1f9d4d..0e044041 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/SWADMain.java
@@ -278,8 +278,8 @@ public class SWADMain extends MenuExpandableListActivity {
             lastVersion = prefs.getLastVersion();
             currentVersion = getPackageManager().getPackageInfo(getPackageName(), 0).versionCode;
             dbHelper.initializeDB();
-            //lastVersion = 55;
-            //currentVersion = 56;
+            //lastVersion = 56;
+            //currentVersion = 57;
 
             //If this is the first run, show configuration dialog
             if (lastVersion == 0) {
@@ -319,6 +319,7 @@ public class SWADMain extends MenuExpandableListActivity {
                 if(Preferences.isSyncEnabled()) {
                 	activity = new Intent(getBaseContext(), AccountAuthenticator.class);
                 	startActivity(activity);
+                	SyncUtils.removePeriodicSync(Constants.AUTHORITY, Bundle.EMPTY, this);
                 	SyncUtils.addPeriodicSync(Constants.AUTHORITY, Bundle.EMPTY, Long.valueOf(prefs.getSyncTime()), this);
                 }
 
diff --git a/SWADroid/src/es/ugr/swad/swadroid/sync/SyncUtils.java b/SWADroid/src/es/ugr/swad/swadroid/sync/SyncUtils.java
index 75bf9cc3..d46154ac 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/sync/SyncUtils.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/sync/SyncUtils.java
@@ -59,17 +59,17 @@ public class SyncUtils {
     }
 
     public static void removePeriodicSync(String authority, Bundle extras, Context context) {
-        if (android.os.Build.VERSION.SDK_INT >= 8) {
-            AccountManager am = AccountManager.get(context);
-            Account[] accounts = am.getAccountsByType(Constants.ACCOUNT_TYPE);
+        if (android.os.Build.VERSION.SDK_INT < 8) {
+	        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+	        PendingIntent operation = PeriodicSyncReceiver.createPendingIntent(context, authority, extras);
+	        manager.cancel(operation);
+        } else {
+        	 AccountManager am = AccountManager.get(context);
+             Account[] accounts = am.getAccountsByType(Constants.ACCOUNT_TYPE);
 
-            for (Account a : accounts) {
-                ContentResolver.removePeriodicSync(a, authority, extras);
-            }
+             for (Account a : accounts) {
+                 ContentResolver.removePeriodicSync(a, authority, extras);
+             }
         }
-
-        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
-        PendingIntent operation = PeriodicSyncReceiver.createPendingIntent(context, authority, extras);
-        manager.cancel(operation);
     }
 }