To use this as a service you MUST provide the parameter wms with value a URL encoded string. For example:
http://edac.unm.edu/cgi-bin/wms2kml.kml?wms=http%3A%2F%2Fedacwms.unm.edu%2Fcgi-bin%2Fmapfiles%2Fimagery_wms%3Fservice%3DWMS%26request%3DGETCAPABILITIES%26VERSION%3D1.1.1
You can enter this directly in your browser or via command line. For example, using the wget UNIX command:
wget -o sample.kml http://edac.unm.edu/cgi-bin/wms2kml.kml?wms=http%3A%2F%2Fedacwms.unm.edu%2Fcgi-bin%2Fmapfiles%2Fimagery_wms%3Fservice%3DWMS%26request%3DGETCAPABILITIES%26VERSION%3D1.1.1
will download your sample.kml file directly.
To download the latest version of the XSLT transformation file for this application please click here.

Enter WMS Service URL:	Output format: .kml .kmz
	Example: http://edacwms.unm.edu/cgi-bin/mapfiles/imagery_wms?service=WMS&request=GETCAPABILITIES&VERSION=1.1.1

ESIP - WMS to KML converter