Drupal search tracking (no replies)

Hello,
on ringsted.dk we use drupal and piwik.
I have enabled search tracking, but when i choose searchtracking in admin, results are empty / no data collected.

If i search on ringsted.dk it will search like:

http://ringsted.dk/soegning/test?meetings=0 or http://ringsted.dk/soegning/test?meetings=1
But the search term is test.
How can i track this search using piwik?