You'd better update Windows Media Player to version 7.1 or higher and update DirectX to version 8.1 or higher at first.
To extract mp3 from Apple Quicktime files (*.mov; *.qt), you need download and install QuickTime Alternative 1.55 for Windows 98/ME/2000/XP. While intalling it, please check "QuickTime DirectShow filter". It's a free tool to help you open and play Apple quicktime files (*.mov, *.qt). You can download the latest version from http://www.free-codecs.com/QuickTime_Alternative_download.htm or get more links from Google.