after updating 7.12 to 7.14 can't update modules
This is probably a problem with folder/file permissions. You can try changing the permissions of the sites/all/modules folder, and of the problematic modules' folders. You can read more about changing permissions here (follow the links there to see what's recommended; basically 755 should do). Possibly these modules cannot be removed by Drupal because of the ownership settings of the files/folders in question.

You can also do a manual update, as explained in the answers to this question.