SFZ does not work when using SF2 files on a 64bit system.
Apparently, the statement above is correct. I was mistakened. I was loading an sfz file with a similar name to a soundfont I thought I was loading named Gort's mini piano.
I stand corrected.
After further investigation, I discovered that the SFZ standalone can load .sf2 files successfully on an X64 OS, but the SFZ pulgin only loads .sfz files in SONAR X1 x64.