Connecting xbox360 to cinema display, 3 short blinks.

Hello,

I would really like the solution for the problem i got here. When im connecting my apple cinema display (aluminium), a old one, via DVI and than a DVI to HDMI converter to my Xbox360 in the HDMI port my cinema display gives 3 short blinks. Does anyone know how to fix this problem? And also i have a really old tiny display that can use for my xbox360 via DVI to a DVI to HDMI converter.

Thanks,

Boris