I'm not one of the in crowd. I just mucked around with HLSL a bit. Still I don't know all the facets.
I am using 32bit as well so can't help you from that end of it.
Maybe someone else could help, but maybe you could post on the MESS board as an alternative? One of the HLSL developers 'Just Desserts' frequents there so he might be able to help you directly? Just an idea if all else fails.