here's the details; the js object instantiates and I can see the code when it is sent the open message. The js extension is where you specified...
OSX 10.6.8, {
"version" : "Version 6.1.4 (22b50b3)",
"platform" : "mac",
"arch" : "x86",
"osversion" : "Mac OS X Version 10.6.8 x86_64",
"samplerate" : 44100,
"iovs" : 1024,
"sigvs" : 64,
"scheduler_in_audio_interrupt" : "off",
"audio_drivername" : "Core Audio",
"audio_driver_subname" : "",
"eventinterval" : 2,
"overdrive" : "off",
"mixerparallel" : "on",
"mixercrossfade" : 1,
"mixerlatency" : 30.0,
"mixerramptime" : 10.0
}