This one is what you should have gotten:
http://www.startech.com/AV/Converters/V ... 80~HD2VGAE
But as JeremyF said yours used with an adapter should work.
Note that some of the self powered HDMI to VGA adapters use too much power. Self powered means it is powered from the RPi board though the HDMI cable. You might want to do so Google searching to see if others have successfully used that model on a RPi.
The better and in this case cheaper units have their own separate power adapter:
http://www.amazon.com/Generic-Audio-Vid ... dmi+to+vga
Go here for my RPi writeup. Basic config, Serial Port add-on etc:
http://blackeagle12.net/Comp/RPi/Rpi.html Click contact icon then world icon --->