Reporting Services availability SQL Server Express 2008 R2

I am trying to add Reporting Services to my already installed version of SQL Server Express 2008 R2. I am installing it on a Windows Server 2008 R2 Standard edition box.

When ever I run the install program to add extra features Reporting services is not listed.

I have installed (I think) all the prerequisit开发者_JAVA百科es needed IIS, ASP etc but to no avail. Reporting services are just not visible in my features list.

Any ideas?

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SSRS is only available in the SQL Server 2008 Express with Advanced Services Download, not the standard one