This is a horrible product. I demand a refund. It tells me no audio device can be found. So I tried Acid, and that works. I am able to do everything I can't do on Music Maker. I get no error message about an audio device that cannot be found. Get back to me.
In a reply to your only other post to these forums, to be found here, you were clearly informed that these are user to user forums. There are no Magix staff here and no-one who posts here is going to get back to you.
You need to email infoservice@magix.net about your request for a refund. Depending on when you originally purchased MM you may be entitled to receive one.