Right click on OUPUTS select All Mods -> create separator.

Type 3. MUSIC & SOUNDS and click OK

Select LOOT from the right combobox and click on Run button (Always run it from Mod Organizer)

Click on the sort button

You will get this screen

Click on Apply

Your mods plugins are now ordered correctly.

Select SKSE and click on Run

In the game main menu load your last saved game.

Start to test if all the mods have been installed correctly.

Make a save game and exit the game.