Blogroll (Timestamp issue)

I have noticed that despite using

<?php get_links('-1', '', '
', ' ', FALSE, '_id', TRUE,
TRUE, 7, TRUE); ?>

(which works- it displays 7 posts, the description, all categories, sorts by ID, etc), it does not display the last updated timestamp (which it should, because the last parameter is TRUE). Furthermore, when I check my DB, I find that the links_updated are all 0000 00-00 00:00, which suggests it’s not getting through. I’ve tried a myriad of things but they are all not working.

Help!