WordPress 2.1 converted pages to posts

Same problem here, but found this

http://www.transycan.net/blogtest/2007/01/23/how-pages-are-different-in-wp-21/

on this thread:

http://wordpress.org/support/topic/105620?replies=2

and it solved my problem.

Basically, on your wp_posts table on mySQL, you just have to replace the value on post_type column: instead of post, it should be page.