Configure the report server

First thing to do to host reports is to configure the report server from "Reporting services configuration"
-Go to start menu>All programes>Microsoft SQL server 2005>Configuration tools>Reporting services configuration
-In the report server virtual directory tab choose the name of the virtual directory in which the reports will be hosted (ex:http://servername/VirtualDirectoryName ... then the name of the report)
-In the report manager virtual directory tab choose the name of the virtual directory in which the report manger will be hosted (ex:http://servername/ReportMangerVirtualDirectoryName)
-In database setup tab, write the servername then click connect> then write the database name> then click Apply
-It is not must to configure these tabs "Encryption keys" , "EmailSttings" and "Execution Account"

NB: Don't forget to click on "Apply" after any change you will made