Topic: theme editing help css

i recently created a community with opensource php platform.there is a usefulness page link in my theme.it has been created by theme creator.i have try to contact him for getting help about this problem.but he didn't help me.so i decided to get help from sitepoint members.this page will redirect my site to member list section.but i doesn't like it.i want to remove it from my theme.how can i do it???i know a little about php and css...what is the template section to edit????please help me.....here is my link http://haffow.com/memberlist.php