Dual booting linux redhat 7 and windows

I have been trying to dual boot redhart 7 with windows 2000 professional and for some reasons I have not been successful booting up 2000 ,can anyone tell me where I m going wrong ? I have 256 mb of ram so I have no reason not to be able to dual boot.I have partitioned my hard drive accordingly and allocated the swap and the native their share as well as windows but I still cannot dual boot .