Return it. The one that came with the HR10-250 will work just as well. DVI/HDMI is a digital signal - it basically either works or it doesn't. If the cable isn't working right, the results will be very obvious to the naked eye.
Unlike what the Monster packaging would have you believe, their cable isn't going to make the colors brighter, the contrast better, etc. It might be arguable with an
analog signal that a very high qualty cable might make a minor difference, but with a digital signal it works, or it doesn't.
I'd go get my $200 back and use it for something you can actually benefit from
