Firebird as defaultbrowser

Hi, do anybody know how to make Firebird the deafult browser? I allready used the ControlCenter. I added Firebird to text/html. But now Konqueror still invokes before Firebird does, so both are running. You can see my configuration at: http://www.foxtrott-nb.de/ftpupload/1.png http://www.foxtrott-nb.de/ftpupload/3.png http://www.foxtrott-nb.de/ftpupload/4.png I'm using: Suse8.2 KDE3.1.1 Firebird 0.6.1 thx for your help