I've used that program and I don't think it can be done.
Don't forget that you train the program to recognize YOUR speech patterns. Is this .wav file a recording of your voice?
Also playing your .wav file into the Mic may not work either, as the voice recognition software needs a slow, monotone and deliberate type of speech to limit errors.
If this .wav file is of a speech that either you or someone else recorded, I doubt if any speech recognition software could transcibe it with any degree of accuracy. IMHO, speech recognition software is just not advanced enough yet.