If you are asking for help, provide lots of detail so problems can be reproduced.
Things to describe:
Operating system ATutor is installed on - Linux
ATutor version - 2.2
Patch #s applied - NA
ATutor theme name -NA
PHP version -5.3
MySQL version -
Webserver & version -
Copies of error messages - No messages
Changes to default settings -
Web browser being used -
...and anything else relevant -
So I tried for eight hours to install. I created my database the same way I did for Zen Cart and Moodle. It works. When I put the info in for ATutor, the next step is a blank page with nothing on it except Atutor 2.2. What files should be changed and what permissions should I put on them? Maybe that's why it's not installing.