Trackback User Warning Errors

I am running D 6.15 and recently installed the Trackback Module and have configured it. When i go to look to see if there are any trackbacks in the que or list I get two user warning errors:

user warning: Unknown column 's.source' in 'on clause' query: SELECT COUNT(*) FROM trackback_received tr LEFT JOIN spam_tracker s ON s.source = 'trackback' AND tr.trid = s.id WHERE tr.status = 1 in /home/mystuff/public_html/sites/all/modules/trackback/trackback.admin.inc on line 75.

user warning: Unknown column 's.probability' in 'field list' query: SELECT tr.*, s.probability FROM trackback_received tr LEFT JOIN spam_tracker s ON s.source = 'trackback' AND tr.trid = s.id WHERE tr.status = 1 ORDER BY created DESC LIMIT 0, 50 in /home/mystuff/public_html/sites/all/modules/trackback/trackback.admin.inc on line 75.

Can you help me trouble shoot? Also might this resolve itself with an upgrade to D 6.16? Thanks.