[drupal-support] mass ownership change

In my Drupal, I had several posts did by user 'admin' (id 1). Yesterday i create a new user to use for posting. Cause I can't do a massive ownership change I edited directly the DB: update node set uid = 3 where uid = 1 (where 3 is the uid of the new user). Now if I login as the new user, I can't edit the pages submitted in the db. Did I miss something to change? Regards maykel