Excel Services 2013 - Issue in saving files to the trusted locations in the server

I am working with SharePoint 2013 with SQL 2012 SP1 and Excel 2013.

I am trying to save a data connection odc file to the trusted data connection file location and I type something like "http://servername/pwa/ProjectBICenter/Data%20Connections/English" and the Excel returns the message "Path does not exist". If I use a shorter form, the problem persists, as shown in the figure below.  Excel is not accepting URL address.

What am I missing?

Thank you.

Best regards, Ricardo Segawa - Segawas Projetos / Microsoft Partner