I'm trying to add a shared data source to an SSRS project. The rsds is stored online on our intranet. I right-click on Shared Data Sources in the Solution Explorer and select Add -> Existing Item. I enter the URL in the box that pops up, find the .rsds file I want to add to the set of Shared Data Sources, and add it. Instead of adding the file to Shared Data Sources, however, it gets added to the Reports folder in Solution Explorer and isn't available to use as a data source. This is my first time using a .rsds like this, but a coworker who has done it before was just as confused as I am.
Is there something I'm doing wrong, or is there a glitch in the system somewhere along the way?