My zero editor just stops working as soon as i start it up

, i've got an xp computer and ive got the dvd rom version of swbfII ive installed patch 1.1 and unoficial patch 1.3 and have got my couler qulity up to 32bit
i have 3.13 GB on my hard drive where theyre both installed and have countered all the issues ive seen on other threads.plz help!
