Yes, sirenmastery works with it, but there are alot of key conflicts that you will have to fix. I don't know why your siren wouldn't work, it should. To be honest, I wouldn't recommend running sirenmastery with ELS, because I only did it so I could have more than 4 sirens. If you want, I can help you fix the ELS problem, or help you install Sirenmastery with ELS.