Please use MPlayer garage page to submit bugreport or support request with the detailed description of what you did and what you have seen in the process, we'll try to help you. This forum thread is just getting too long and unmanageable.

As for older versions of MPlayer builds for maemo, they were not packaged for application manager. And considering that you are not very familiar with linux in general, it would be hard for you to try them and just even more questions can arise.