I use: " mmclient-webinterface-bin.war "  version1.2  from the site: http://www.semwebcentral.org/frs/?group_id=44
I use Tomcat 6  and java 5.
when I click on the button "Submit Query". 
I get the following error in the log file of juddi:

ERROR org.juddi.handler.HandlerMaker - can't find handler for element type "capability_search".

Please, have you any idea about this problem?
Thank you very much in advance.