4870 in CrossFire

Hi everyone.

Just built myself a new computer a couple weeks ago, and couldn't be happier. Well...actually, yes I could be. See, I have 2 4870s, but for the time I've had my computer, I didn't have a crossfire bridge. Just came in today, and I installed them, but to no avail; no performance was increased. I used fraps to test out my main 2 games that I play, which are oblivion (the one I play the most often, by far) and fallout 3, and then net_graph in CS:Source. In every of those three games, I just about get a 60 fps frame rate (everything completely maxed out, both on the card, and on the game) on a measly 1280x1024 (the max my monitor supports, i have a 19"); a little more or less depending on the environment I'm in. THat's with 1 4870. That's actually pretty good, but I wanted to actually get into the 70s and 80s. I know it's possible, because I've seen it, both on forums, and with friends running similar rigs. However, when I got my bridges in earlier today and then installed them...nothing happened. I checked enable crossfire, but nothing happened, no performance increase. I then followed the advice from a site; I uninstalled the drivers completely and used drive cleaner pro to really clean it out, then I put one 4870 in and installed the drivers for that (the latest 8.11). I shut down the computer and then put in the second card WITHOUT THE BRIDGE and then installed the drivers for that, then shut it down again and put the bridges in and then turned on crossfire, but then same thing. I get the same exact fps every time. No improvements whatsoever. I then tested a game (oblivion, which is the game that I built my system on) with crossfire disabled, noted the frame rate, then did the same thing in the same place with crossfire enabled, and I got the same exact fps. I must be doing SOMETHING wrong, because I know I should be seeing SOME kind of improvement. I mean, when I look at configure and diagnostics, it's just a blank page. Can anyone help me? Here's what I'm running if it helps;

Windows Vista Ultimate 64-bit, Intel Q9550 @ 3.2 GHz, 8GB mushkin DDR3 1600 (4x2gb), Asus Rampage Extreme, and of course, 2 ATi 4870 GPUs.

If you need to know more, just go ahead and tell me what else you need to know.