People sometimes get abberant results if they use stereo mini-to-mini plugs... You want mono ones if possible. If that isn't it, you may have a bad relay or something.
If you have a voltmeter, you might also check to make sure the Proceed is really going to +12V and staying there...
If you have a voltmeter, you might also check to make sure the Proceed is really going to +12V and staying there...