Using HKP:// with Seahorse

[ie84-hg07-ehfu-3k9r hyperspire com]

Hello there,
    I noticed in the Help section it notes supporting the hkp://
protocol, however any attempts at adding hkp://keys.gnupg.net does not
seem to work as the "Okay" button has been disabled under the Add Custom
server dialog. It only seems to recognize the ldap:// protocol prefix.
IS there a preference file somewhere I could potentially hack to add
this server manually?