Please read the next post made by the developer of
RM Recorder to learn how to reset the settings of the Real Player.
You may also wanna try Real Alternative instead of the Real Player. It allows you to play RealMedia files without having to install RealPlayer/RealOne Player. The RealMedia Browser plugin supports Internet Explorer, Opera, Netscape and Mozilla. Besides Real Alternative is absolutely free!
Although AFAIK
RM Recorder works better with the Real Player.