Yup. The fan failed originally, so I replaced it with that heat sink. It's originally from a Hipro PSU, but works quite well on that card. It's only an FX5200, so it doesn't get that hot.
No wonder it doesn't work! You installed the coils backwards!
Lol. What was the original cooling like? Was it one of those really small heatsinks? Because ive got like 3 passively cooled fx5200s, and i can't imagine meeding a fan!