I got a mini displayport to dvi adapter for my macbook pro 13". Then I have one of those dvi to vga converters (like this: http://tinyurl.com/39j9x68) that i used to use w/ my old desktop. Will that work ok on top of the displayport to dvi adapter? I tried it on my tv (which only has vga and hdmi, no dvi) and it recognizes the display but I only get a black screen. I've had problems setting the tv up properly in the past, so it could just be the TV. I wanted to rule out it being the vga adapter though.