Firefox and Kmail

Been trying to set the mailto parameter to kmail.

In about:config I have set:- to /opt/kde3/bin/kmail

network.protocol-handler.expose.mailto to true

setting kmailservice instead of kmail does nothing.

What am I missing?

Thanks for reading

The only thing I did was to set to kmailservice.
and it works.

Deleted Googlebar, which took out Googlemail. Set kmail via the preferences->applications. Reinstalled Googlebar and it now works.

Any amount of fiddling with failed to get it working.