Location Module: simply filter nodes by zip code exposing distance / proximity filter

There are a few issues on the subject but no clear directions on getting this to work. It seems simple but it's not working.

Location Module: 6.x-3.1-rc1
Latest Core, Views, CCK

I have a node type of 'clubs' using the CCK Location fields. I've created a Locations View. Set filter to Distance / Proximity using Form Mode "Postal Code (assume default country)" exposed. Another Filter for Node type 'clubs' and type 'published'. Added fields Node 'title' and Location 'distance / proximity'. The display for the view is a Page.

viewing page, entering zip code (US) into filter returns nothing.

This is for a large project due very soon, any help would be greatly appreciated. The site isn't live to the public as of yet.

Running the view generated query in the console returns 0 rows effected:

SELECT location.lid AS lid,
(IFNULL(ACOS(0.81839584910135*COS(RADIANS(location.latitude))*(-0.042468712119446*COS(RADIANS(location.longitude)) + -0.99909779726057*SIN(RADIANS(location.longitude))) + 0.57465488266757*SIN(RADIANS(location.latitude))), 0.00000)*6371051.323167) AS location_distance_0,
node.title AS node_title,
node.nid AS node_nid,
location.latitude AS location_latitude,
location.longitude AS location_longitude
FROM location location
LEFT JOIN location_instance location_instance ON location.lid = location_instance.lid
LEFT JOIN node node ON location_instance.vid = node.vid
WHERE (location.latitude > 20.602378306342 AND location.latitude < 49.548555693658 AND location.longitude > -110.21529600906 AND location.longitude < -74.65272399094) AND ((IFNULL(ACOS(0.81839584910135*COS(RADIANS(location.latitude))*(-0.042468712119446*COS(RADIANS(location.longitude)) + -0.99909779726057*SIN(RADIANS(location.longitude))) + 0.57465488266757*SIN(RADIANS(location.latitude))), 0.00000)*6371051.323167) < 1609347) AND (node.status <> 0) AND (node.type in ('club'))