Wdtv slingplayer problems

I too have the aspect option greyed out, which is what brought me to this topic thread, but it causes me the opposite problem as that of the OP. I’ve hooked up the WD TV to an old TV in my basement that’s still an old SD CRT. The Slingbox Pro-HD is hooked up to an HD source (DirecTV HD PVR) and is therefore streaming widecreen.  With the aspect option greyed out I can’t windowbox it on this old TV.