Using an old version of VSampler myself (along with other "oldies" Absynth v3, Arturia MoogModular V v2) and it works fine on Windows 7 64-bit with Sonar X1 64-bit.
The default install location for 32-bit programs and plugins is different than 64-bit programs and plugins, so I had to manually add the VSampler location to the VST scan path.
Once I did that, works great - 'bitbridge' works automatically and seamlessly behind the scenes with no issues. :)