Venue 8, remote debugging on Windows 8.1

I've developed a Windows Store app, that works great on my Dev machine (Win 8.1 Pro; VS 2013 Community Update 4)

I try to connect over my network to my Windows 8.1 tablet (Not pro, Dell Venue 8"). I can see both devices on the network. My Dev box can see shares on the tablet, and the tablet can see shares on the Dev box.

When I try to run remote debugging, it asks for authentication. I am logged in on both machines (which I believe are on the same homegroup/workgroup) with the same Username/password, but it still asks for authentication, and tries to use my Dev PC's name as the domain.

What am I missing? Since the tablet is not Pro, I do not have the local security policy editor.