Here are the simple and clear steps:
1 - While you are editing the page scroll down to (Custom Fields)
((if you can't see Custom fields enable it from the "Screen Options"))
2 - In the Custom fiends add the value "hide" ( without quotes )
and click save field..
3 - now publish the page and it will be working 100% :)
* To Plugin maker.. please simplify the instructions on the plugin's page.. and display the technical information of the plugin in FAQs section.. people mistake your plugin for broken.
trust me I have created some scripts before and believe me you have to take laziness, lack of knowledge, inexperienced users into consideration.. :) thanks!