I installed this on my site. I am able to add items to the xsell in admin but when I go to the page it throws this error:

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7
in:
[select distinct p.products_id, p.products_image, pd.products_name from ntt_zen_products_xsell1 xp, ntt_zen_products p, ntt_zen_products_description pd where xp.products_id = '1665' and xp.xsell_id = p.products_id and p.products_id = pd.products_id and pd.language_id = '1' and p.products_status = 1 order by xp.sort_order asc limit ]