error 1 setup wan unable to verify that SQL server agent (sqlagent$SQLEXPRESS was runing
an error was occured while establishing connection to t he server .When connecting to SQL server 2005
Microsoft SQL server Reporting services
Setup failed to validate specified reporting services report server http://WIN3/ReportServer
Your error is related to 2 issues:
1: setup wan unable to verify that SQL server agent
For resolving it verify that this service is running on the sql machine.
2: Setup failed to validate specified reporting services report server
This is somewhat a generic error which could be due to some problems with Reporting Services installed on SQL machine. First of all you have to configure Reporting Services on Report Server to install DCRM 4.0. If you havent configured it then please do so: you can google over it if u dont know how to do it.
Also try to browse this Reporting URL http://Sqlserver/ReportServer
and see whether it responds or not.
It may be an idea to re-install SSRS, just Reporting Services not the rest of SQL. Particularly if u have made any chnages to IIS since it was installed.