Trying to publish reports to our Report Server

I'm trying to publish reports to our DASP report server, but get:

The attempt to connect to the report server failed. Check your connection information and that the report server is a compatible version. (Microsoft.ReportingServices.Designer)

I'm using the username / password from our MS SQL Server 2005 Reporting Service Information.

I checked the deployment credentials via the dev server where I'm creating the reports, and they seem right.

I know the username / password has all the rights if I log onto the DASP server and check the security tab.

 

We're subscribed to the SSRS 2005 via DASP

 

At the end of the deployment server URL, you have to put "ReportServer".

Thanks!