Just so I might be able to get my hands on the updated version before my one year subscription of the extension expires (2014), I will give you a pointer for a fix as I got my extension to work.
Your extension works only with preset search field parameters of JomSocial.
Around Line 677 under function create(&$uri),
case 'search':
if(isset($task)) {
switch($task) {
case 'field':
$title[]=$task;
@$title[]=$FIELD_GENDER;
@$title[]=$FIELD_STATE;
@$title[]=$FIELD_CITY;
@$title[]=$FIELD_COUNTRY;
@$title[]=$FIELD_COLLEGE;
@$title[]=$FIELD_GRADUATION;
Whatever field that are not listed here will not work, so I manually added custom fields in order for them to work in my search. Your goal will be to automatically pick up custom fields in this function.
Hope this helps.