Unknown table '153index' in where clause

SELECT a.id, a.title, a.subtitle, a.date, a.autor, a.introduction, a.maintext, a.creation_date, a.image, a.image_version, a.image_link, a.image_link_target, a.image_zoom, fdet.description as image_description, f.type as image_type, f.width, f.height, a.rid, a.hide_title FROM xt_articles as a LEFT JOIN xt_files as f ON (f.id = a.image) LEFT JOIN xt_files_details as fdet ON (fdet.id = a.image AND fdet.lang='en') WHERE a.id = 153index.php AND a.active = 1 AND (a.display_time_start = 0 OR a.display_time_start < 1268253026) AND (a.display_time_end = 0 OR a.display_time_end > 1268253026) AND a.lang = 'en'

In File: /var/www/vhosts/frox.com/httpdocs/xt/plugins/ch.iframe.snode.articles/viewer/index.php
On Line: 74
Fatal error: Call to a member function on a non-object in /var/www/vhosts/frox.com/httpdocs/xt/plugins/ch.iframe.snode.articles/viewer/index.php on line 77