24 bit gets truncated to 16 (whatever sample rate you use)
96k gets recorded with a 48k header - this can be changed to achieve the correct playback speed, but the JB3 can't keep up with the data rate and drops samples. You'll find glitches in your recording.
I don't know sound forge but you basically want to change the sample rate, not convert it. The change should occur instantly, without processing. In Cool Edit Pro, you go edit, adjust sample rate