MS Sharepoint 2007

Requirements of Sharepoint 2007 :

1) MicrosoftWindows Server 2003
2) IIS 6.0
3) Dot Net Framework 2.0
4) Workflow foundation (Available with Dot Net Framework 3.0)Unzip DotNet 3.0 and install
WF.
5) SQL Server 2005 or SQL Express Edition.

Errors:-

When you create new web application ,the application created successfully but the home page cannot opened and it give an information:
" HTTP/1.1 404 Connection: close Date: Fri, 17 Oct 2008 19:28:00 GMT Server: Microsoft-IIS/6.0 X-Powered-By: ASP.NET MicrosoftSharePointTeamServices: 12.0.0.4518"
this is not an error, infact this new application have no "site collections" by default, you have to create site collections by selecting this application.
select "Collaboration Portal" template during site collection creation.
Now your new application is ready to open.