As seen in screenshot below, the SP is returning data as expected when the ExecuteQuery is clicked:
Unfortunately, once you're returned to the Choose Data Source page of the ReportWizard, only one of the twenty fields shows up:
And similarly on the next page (), only that one field shows up:
What is the issue here? I've done this MANY times and it isn't working. It worked fine a few days ago, so I don't know what has changed. Because of this issue, I'm unable to design my report.