Exposed filters don't work

I am making this a new issue, instead of adding to the old issue, because I'm using a different version of Calendar-- my apologies if that's not the right procedure.

I have a calendar on my site, I've added exposed filters that work fine on table views, but on a calendar view, they do nothing. I have selected to inherit exposed filters, and I am using Views 6.x.2.5 and Drupal 6.11

Here is the query the view produces:
SELECT node.nid AS nid,
node.title AS node_title,
node_data_field_dates.field_dates_value AS node_data_field_dates_field_dates_value,
node_data_field_dates.field_dates_value2 AS node_data_field_dates_field_dates_value2,
node_data_field_dates.field_dates_rrule AS node_data_field_dates_field_dates_rrule,
node_data_field_dates.delta AS node_data_field_dates_delta,
node.type AS node_type,
node.vid AS node_vid,
node_data_field_date.field_date_value AS node_data_field_date_field_date_value,
node_data_field_date.field_date_value2 AS node_data_field_date_field_date_value2,
node_revisions.body AS node_revisions_body,
node_revisions.format AS node_revisions_format,
node_data_field_venue.field_venue_nid AS node_data_field_venue_field_venue_nid,
node_location_instance__location.city AS node_location_instance__location_city,
'Unknown' AS node_location_instance__location_distance_6
FROM node node
LEFT JOIN content_field_dates node_data_field_dates ON node.vid = node_data_field_dates.vid
LEFT JOIN content_type_fieldtrip node_data_field_date ON node.vid = node_data_field_date.vid
LEFT JOIN content_field_venue node_data_field_venue ON node.vid = node_data_field_venue.vid
LEFT JOIN node node_node_data_field_venue ON node_data_field_venue.field_venue_nid = node_node_data_field_venue.nid
LEFT JOIN location_instance node_node_data_field_venue__location_instance ON node_node_data_field_venue.vid = node_node_data_field_venue__location_instance.vid
LEFT JOIN node node_location_instance ON node_node_data_field_venue__location_instance.nid = node_location_instance.nid AND node_location_instance.nid != 0
LEFT JOIN node_revisions node_revisions ON node.vid = node_revisions.vid
LEFT JOIN location_instance node_location_instance__location_instance ON node_location_instance.vid = node_location_instance__location_instance.vid
LEFT JOIN location node_location_instance__location ON node_location_instance__location_instance.lid = node_location_instance__location.lid
WHERE ((node.status <> 0) AND (node.type in ('date', 'fieldtrip')))
AND (((DATE_FORMAT(ADDTIME(node_data_field_dates.field_dates_value, SEC_TO_TIME(-18000)), '%Y-%m') <= '2009-05' AND DATE_FORMAT(ADDTIME(node_data_field_dates.field_dates_value2, SEC_TO_TIME(-18000)), '%Y-%m') >= '2009-05')) OR ((DATE_FORMAT(ADDTIME(STR_TO_DATE(node_data_field_date.field_date_value, '%Y-%m-%dT%T'), SEC_TO_TIME(-18000)), '%Y-%m') <= '2009-05' AND DATE_FORMAT(ADDTIME(STR_TO_DATE(node_data_field_date.field_date_value2, '%Y-%m-%dT%T'), SEC_TO_TIME(-18000)), '%Y-%m') >= '2009-05')))
ORDER BY node_data_field_dates_field_dates_value ASC, node_data_field_date_field_date_value ASC

If there's something else I could post that would be helpful, please let me know.

Thanks,
Ellen