For what ever reason this returns the number of entries not the value. I found this could be a bug actually cause it's supposed to work.
http://article.gmane.org/gmane.comp.lang.perl.modules.lwp/1007
http://groups-beta.google.com/group/perl.beginners/browse_thread/thread/84e53f42f011521e/16f0bf1ce4925e0e?q=HTML::Form+value_names&_done=%2Fgroups%3Fq%3DHTML::Form+value_names%26hl%3Den%26lr%3D%26sa%3DN%26tab%3Dwg%26&_doneTitle=Back+to+Search&&d#16f0bf1ce4925e0e