How to deploy a report to the report server on localhost?

I have installed SQL Server 2012 Standard on my lap top

I can see the report server on the URL:

http://steffen_laptop/Reports_SQL2012DEV/Pages/Folder.aspx

In BIDS, on the Properties on my Report Server Project I have under TargetServerURL put
http://localhost/Reports_SQL2012DEV

But when I try to deploy my report I get the error message:

The specified report server URL http://localhost/Reports_SQL2012DEV could not be found.
Verify the syntax of the URL and that the report server exists.

Any idea to how to make it work?

On my machine I have also an instance of
SQL Server 2012 Express Edition With Advanced Services installed, and there I can easily deploy my reports to the report server.

Any advice on what to do to be able to deploy my reports on SQL Server 2012 Standard?

In reporting services configuration manager I have put Service Account as Use built-in account: Network Service.