This could be due to one of a number of things. What is your environment -
single or multiple servers, what authentication are you using - NTLM or Kerberos
- what account are you using to do the installation - same as the application
pool acct - have you switched your SQL Server 2005 SP2 to SharePoint Integrated
mode - have you activated the Reporting Add-in Feature on your Web front-end
server? Feel free to ping me privately on this to troubleshoot further (I'll
post any cumulative results back here)..