Will not boot after Airport card upgrade

The airport card on my daughter's MacBook died (would no connect, did not show up in System Profiler) so I decided to replace it. I also decided to get the upgraded 802.11n card so she could take advantage of faster networks. I ordered the MacBook 802.11n Airport Extreme card from this website and followed the excellent instructions to install the card. I ran into a bit of a problem because the MacBook had 3 antenna wires and the new card only took two, so I left the middle (blue) one disconnected. When I put everything back together and tried to boot the laptop, it wouldn't boot. The power LED came on and I could here the optical drive spinning (there was a DVD in it) but no chime and the screen remained blank.

I opened the case back up and rechecked everything, but it still would not boot. I finally put the old card back in and now it boots and everything is working like before (with the old dead Airport card.)

Did I get a bad card or is it just not compatible with my MacBook?

I've got OSX 10.5.8 installed.