This is not an XP issue at all. It is a scripting issue or a web hosting issue or a program issue.
1)You are either building a website or have one that you are adding content to
2) you are installing a program > Drupal to your website which requires the PHP programing on a MYSQL database
3) you are modifying the content of the program Drupal >Roles - Drupal comes with two default user roles - anonymous user and authenticated user; you can add additional roles such as administrator, moderator, etc
4) XP may be your operating system...but what you are doing is not an XP problem nor issue.
Now contact the Drupal program forums or the hosting site that supplied you the program to use or submit this query into the correct forum for this site
Change Is Good