Windows SharePoint 2003

Hi ,

I have an issue regarding Windows SharePoint Portal Server & Services. In my office I have installed Windows SharePoint Portal Server 2003. There i have created some "Top Level" sites and few "Team Sites". There are five people who are the "Administrators" and one person who is the "Reader & Contributor". Now the issue is that the person who is the reader and contributor cann't able to access the sites though the others can. I have checked the basic parameters which an Administrator can check but the ice didn't melt.

So, am requesting you to plese help me out of this serious issue.

Make sure the user has access to the top levels and everything in between.