Does Not Meet Minimum System Requirements?

I just built a new computer for myself, but now when I open SL it tells me I do not meet the minimum requirements for it.

I'm running:
Windows 7 RC (build 7100)
AMD Phenom II x4 3.0GHz processor
8GB of RAM
1680 x 1050 screen resolution
NVIDIA GTS 250 graphics card

As all of this is significantly better than the laptop I was on and using SL with before, I can't see why it would be giving me this message. In addition, when I log in everything seems to work fine, other than just about everything rezzing slowly. I'll presume them to be related, but I'm still at a loss as to why that would be.

The viewer has a list of cards considered fast enough. Because your card is newer than the viewer it's not one of the cards on the list.

I got the same message with a nvidia gtx 275. Just move the graphics quality slider over to where you want it and everything will be fine.

(P.S. Believe me, that gtx 275 is fast enough!)