Gallery Item Admin page width problem

Hi everyone. I embedded gallery 2 on my drupal 4.7 website. everything seems to work correctly on the website but once i click on edit at the bottom of gallery page (Gallery Item Admin page)--where you can add albums and etc, the width just destroys the whole page. what is worng with this? where should i start looking to fix this. thanks...i've been searching for an answer for this for 3 days already...i'm attaching some pics to see the problem...