i just replaced the version you downloaded....wanna try again ?
There is actually a mame version for 64bit its " Mame0145b_64bit.exe" found it on thier website but if the usual works fine i cant quite work out why they made a specific ??
Its strange why its a problem......This end so far its worked on everything...Weird !!
Wish a few more peeps would try it so i can filter the problem