Failed Install

I keep trying to install wordpress but it seems to be failing. I am installing through cPanel Fantastico – WordPress 2.1 on my own dedicated server When I install – it seems to go okay. All the files are in the proper directory. I can view the readme.html file in my web browser, I can go to the install.php page – and it says I’ve already installed wordpress. Then, I can click on the link for login – and type in the username/password – and press submit, it just fails. I get the standard explorer/firefox “page not found” message. Then, I can no longer go to login.php – it just fails. And if I just try going to the root directory of wordpress – I get the page cannoot be displayed message.