How can I get Snow Leopard to recognize my third partition?

How can I get Snow Leopard to recognize my third partition?

I installed Snow Leopard on my Macbook Pro. I then installed Windows 7 in a Boot Camp partition. Then using Windows 7's disk management console, I resized my Windows 7partition and created a 3rd NTFS partition for data, intending for both Windows 7 and Snow Leopard to read/write this partition.