vArranger is a true 64 bit application on x64 OS (not emulation of x32)
For X64, the only one who works today is :
http://www.tobias-erichsen.de/loopMIDI.html

LoopBe1 own a feedback protection who is badly programmed. I asked them to correct the bug I found, but they didn't listenend to me...

Rikki, let me know if you can get good and playable sounds with the SD2 soundfonts