I installed SQL Server Reporting Services on Windows 2000. At the end it said I had to manually activate Reporting Services.
This is what I did:
C:\WINNT\Microsoft.NET\Framework\v1.1.4322>aspnet_regiis.exe –i
Then this….
C:\WINNT\Microsoft.NET\Framework\v1.1.4322>rsactivate -c"C:\Program Files\Microsoft SQL Server\MSSQL\Reporting Services\ReportServer\RSReportServer.config"
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If you had to restore a database that crashed, you'll need to restore the RSReportServer.config and then do a -r like this:
C:\WINNT\Microsoft.NET\Framework\v1.1.4322>rsactivate -c"C:\Program Files\Microsoft SQL Server\MSSQL\Reporting Services\ReportServer\RSReportServer.config" -r
Found the answer here:
http://sqlforums.windowsitpro.com/web/forum/messageview.aspx?catid=92&threadid=27885&enterthread=y