html table problems

Hi again, I got a problem, This is a quick job for the right guy (I hope this time will do it). I have problems with html tables: I am using a 3 column but when I set up the width so that it should fill the screen it shows ok in firefox but not in IE. I want someone who knows about html and tables to view the code and correct it and show me the result. Then perform a test on various machines (pc/mac) browsers (ie, firef, safari, opera) and versions (previous and current).