magnet.protocol file and KDE

Hello. I have using konqueror browser to browse local site with magnet links. But It is a bit annoying to copy-paste all of them into linuxdcpp, so I have tryied to create magnet.protocol file for it, and entered 'linuxdcpp' as application for magnet links. But when I am trying to click on magnet links, It is not opening magnet in linuxdcpp, nothing happens, and 'only one linudcpp for profile allowed' message appears. Advise me please.