Well I replace all. Crashing the mame64 when I load it. So I went into my C:\Windows\SysWOW64 and then copy those. Still isn't working. Maybe it doesn't work on my Windows 8. Pretty much something isn't loading at all.
Update: It does not work with 64bit game executables yet, however 64bit support should be coming in the near future - so far use the 32bit version of your game if it gives you a choice between 32 and 64bit.