What is a "Mioerror" I have never heard of that. Is it a typo and you mean mirror error? When you get these errors you should really either copy them word for word, or provide a screen shot. I have been around windows computers since the very beginning, and have no idea what you are talking about.
Back in 2009 the German site had a question about mioerror: (auto translated)
I had the same problem with Magix Video Deluxe 15 Premium. Why do I suddenly Mioerror the error message: Unknown got is really unknown. I could solve my problem as follows: I have to open my film instead pretended that I wanted to create a new project, I added a short film scene and everything saved under a new name. In this new project, I then "File, Load project" loaded my old project and saved. So in the new project, two films, the short film scene, as well as my real movie. Then have the short video deleted from the project and re-saved. Everything worked out great. The level indicator was back and I was able to burn as usual.
luck!