i have a problem with beginners level 3. i tried firebug and html editing in chrome a none of that works
What exactly did you try editing?
<p id='incorrect'>You are not authorized to view this page.</p><br/><br/>
this string with chrome and mozilla firebug did'n work
tryed to change it to correct and still no result.
Perhaps you should look into different ways websites determine whether or not you are authorized to view a page.