link taxonomy AI1EC

Hey,
I created a new taxonomy and I would create a link that redirects on the calendar with a filter when you click on it. I know the piece of code that must be changed, but it does not work.
That’s what I change in helper> class-ai1ec-app-helper:

calendar_term_link function ($ link, $ term, $ taxonomy)
{
global $ ai1ec_calendar_helper;

if ($ taxonomy == ‘events_organisation’) {
if ($ term-> term_id == AI1EC_FAKE_ORG_ID)
$ link = $ ai1ec_calendar_helper-> get_calendar_url (null);
else
$ link = $ ai1ec_calendar_helper-> get_calendar_url (null,
array (‘org_ids’ => array ($ term-> term_id))
);
}

return $ link;
}

Someone know where is the problem?
thx