problem setting up dmraid nv-sata

[Unrelative]

Hey, I'm new to dmraid. I have Gentoo setup on a RAID 5 3ware card and I have 2 80GB drives that are setup in RAID 0 for Windows. I would like to be able to read the windows drives from Linux and setup dual boot. I am running 64-bit Gentoo, so I downloaded dmraid and ran './configure', it worked fine. When I ran 'make' it gave me this error:

activate/devmapper.c: In function `dm_version':
activate/devmapper.c:226: error: `DM_DEVICE_VERSION' undeclared (first use in this function)
activate/devmapper.c:226: warning: assignment makes pointer from integer without a cast
activate/devmapper.c:228: warning: implicit declaration of function `dm_task_get_driver_version'
make[1]: *** [activate/devmapper.o] Error 1
make[1]: Leaving directory `/downloads/dmraid/1.0.0.rc9/lib'
make: *** [lib] Error 2

Anyone know how to fix this or what I can do?

Thank You
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