Firefox and Opera problem with IIS 5.1

[brickwall]

I need some help guys.

I have reformatted my drive and re-installed IIS 5.1 (and everything else) on my development PC. It's up and running but I couldn't get Firefox 1.5 and Opera 8 to work when accessing [localhost...] Firefox asks for a username and pass (IUSR_ComputerName doesn't work) and Opera says "The server requested a login authentication method that is not supported." IE works fine.

Before I reformatted, everything works well. What did I forgot to do with this IIS 5.1 install?

Thanks in advance.

[mrMister]

It sounds like you are using Windows Integrated Authentication rather than Basic Authentication

[brickwall]

Iam not sure because Iam not much of a systems guy.

I did not tweak any default IIS settings on this WinXP Pro fresh install. Since I reformatted and had to reinstall everything, the only thing odd I did was install PHP (ISAPI) and MySQL (auto using installer) first before I installed Firefox and Opera. Could that be the cause?

How do I know which authentication method Iam using and how do I revert back to basic authentication?

Thanks again.