Q: no HDMI out to video display

I recently received a new MacBook pro 15" and 2 Dell 27" P2714H monitors.  I can run a mini display port to one of the Dell Monitors, but I tried to run an HDMI to DVI Port (not mini DVI) to the other Dell Monitor, no signal...I have 2 displays working(MacBook pro + 1 Monitor).  Is it possible to get the other working?  Should I try HDMI out to DVI?  There is a DVI port on the Dell.

Thanks