PWA

Question

HI, I am working as a Network/System Engineer here in Karachi. I have deployed MOSS 2007 in my office. Currently i am facing issue with users permissions like every can see others docs,time sheets , tasks etc in pwa when they login. I tried to sort this matter out. In this i changed the view setting to [me] in all options. Is there any other way i can perform this task. I will greatly appreciate your comments on this and also if you let me know some others tips regarding security of PWA. Thanks.