Problem of SQL Server 2005 Reporting service installation

The report manager site not working properly after I install the SQL Server 2005. I have been tried to fix it since yesterday. But it just getting worse. I need to get this to work properly before I can install the Visual Studio Team Foundation Server.

I am following the Visual Studio Team Foundation Installation Guide.
The Steps I have done so far are:

1. Install SQL Server 2005 and assign application pool to reports and report server sites in IIS.

2. Try to install Team Foundation Server, but I noticed that it requires sharepoint service to be installed first. The service seems already installed in this computer. So I didn't reinstall the sharepoint service. When I try to exclude the SQL Server Reporting Services Web applications from share point service, the command throw exceptions. When I try to view the localhost/reports, the page has errors(Reports server Unable to generate a temporary class, CS2001: xxx.dll could not be found error CS2008: No inputs specified). xxx.dll refers to different dlls each time I request the page.

3. Uninstall Sharepoint and reinstall, still encounter the same problem.

4. Uninstall SQL Server 2005, I also noticed the ReportServer sites in IIS haven't been removed after uninstallation. So when I reinstall the SQL Server again, on the Report Server Installation Options page, I can't select Install the default configuration (default selection), instead the second option is selected which is no auto configuration(options are all grey out so I can't change the selection). After installation, the report server site get a no page found error.

I also noticed in IIS - Report Server(Stop) can't be start. I get a Parameter is incorrect error when I try to restart. There is two sites underIIS - Report Server(Stop) , they are Reports and ReportServer, they seems correct. But if right click the Report Server(Stop) and click Properties - Asp.NET tab. It point to the D:\Program Files\Microsoft SQL Server\InetPub\wwwroot\web.config. However, I can't find any web.config under Microsoft SQL Server\InetPub\wwwroot\. So it seems something missing there...

Please help... Any idea and suggestion are welcome!
There are a lot of pieces at work here. For some reason, SharePoint doesn't seem to be too happy. We are working on making the RS and SP combination setup experience better but this won't be until RTM. Here is what I would do:

1. Uninstall SQL Server (and RS). Delete the virtual directories in IIS and the SQL directories in the file system (including the databases)
2. Uninstall the .NET Framework 2.0 (this shouldn't be the reason, but just to be safe)
3. Reinstall SharePoint. Make sure that it is working, including the ability to exclude virtual directories.
4. Install RS. You might have to go with a 'non-default' install and use the RS Configuration tool to create the virtual directories. They will need to be in a different application pool than SharePoint. If the default install works, you will need to change the application pool for the vdirs created by setup.
5. Exclude the RS virtual directories in the SP Site Configuration.|||Thank you for your detailed information. One more question, I installed Active Directory after installed the IIS. In your case, did you install IIS after you install AD or before? I just wonder whether I should reinstall IIS.

Cheers|||Thank you very much, I uninstall IIS and sharepoint and reinstall them, everything works fine so I eventually can begin install the Foundation server, but when I install the server, I get 32000 error.
Error 32000. The Commandline "D:\ProgramFiles\Microsoft Visual Studio 2005 Enterprise Server\BISIISDIR\sdk\bin\tfsadaminst.exe" /install DIONYSUS 2420 TFGSS Hyperknowledge\TFSSETUP' return non-zero value:1

I have a look the event viewer and these errors are all cannot create *** performance counter, for example:

The report server cannot create the Cache Misses/Sec (Semantic Models) performance counter.

I wonder wether the memory is not enough in the machine...