CS4 takes forever to export DVC Pro HD/30pn
 

I just Finished a 2 minute clip DVC Pro HD/30pn with my HPX 170. Some clips were Over cranked at 48 frames per second. I used Adobe Premiere CS4 just as a test. When I exported, it took over an hour to export the 2 minute clip. Nothing special other than a few transitions and the slow mo from the camera. This is the first I have used DVC PRO HD/30 pn with a P2 camera. I mostly use standard Definition that renders and exports quickly with this system. I have a decent computer but I thought the time to export is rather long. I wonder if it's my video card? Does anybody know if there is something I'm doing wrong?

Computer: MB GA EX 58-UD5
Diamond Radeon HD 4870
i7-860 2.8 ghz 8mb cache
(3) WD Caviar Black 2TB 7200/64mb/Sata
Windows 7 64 Bit
12 gig Ram

Thanks for helping
Art