Dell Dimension 5150 will not install a 64bit OS

I have a Dell Dimension 5150 with 0WG621 mobo,it has a Pentum 4 640,thats a 64bit processor with 2 GB ram,but can't install Windows 7 or 10 64bit,it will only install a 32bit OS,its start to load the setup then restarts the PC,and I don't know why,I have a Intel Pentium D 945 3.4 GHz processor for it,If I put this in will it only come up the error message but still boot the OS..? I have Windows 10 32bit on it at the moment,would love to be able to put Windows 10 64bit on it,any help would be appreciated..???