this extension should make it work:
(port of mozilla wmlbrowser https://addons.mozilla.org/en-US/firefox/addon/62/
download the 7z extension(not the firefox one) and extract in kmeleon's root folder.
this extension has a component file so you must delete 2 files in k-meleon\components folder after extracting it, this is to register the new wml component.
the 2 files to delete are:
restart kmeleon and those 2 files will be created registering the newly added wml component. if you use the extension manager; it will automatically register components.. you can download the extensions manager from this link http://kmext.sourceforge.net/kem.htm
you can test the extension at this link: bleb.org/waptv
it should look like this:
if it loads as a blank page, this means the component hasn't been registered properly..make sure to delete compreg.dat and xpti.dat and restart kmeleon or just use the extensions manager to install it. good luck.