Either she isn't understanding your "whoa" command, or you aren't communicating it effectively enough. Maybe you're just dropping the whip, but not really putting yourself infront of her motion? If so, the dropping of the whip means nothing to her, because you're still in a 'go' postion. Also, you shouldn't have to keep the whip "up" while free longing...the whip is only a 'go' foward cue, and should be dropped right away, otherwise you are always giving pressure to her even when she has responded to it properly.
Try 'overexaggerating' the whoa cue for a while, by stepping a bit further infront of her motion than you normally would, so there's no doubt that she shouldn't 'get' what you are asking her to do. Give her a few seconds to stop, and turn in toward you, and if she doesn't stop, then you need to drive her onward, not let her continue to run blindly. "Ask" her to stop often, but if she doesn't stop right away, you need to continue asking her to move...she shouldn't be the one deciding when to stop. Change directions often, as well...she will eventually start asking you to let her stop (turning her ears to you, trying to stop on her own, licking her lips, etc); again, don't let 'her' decide when to stop, however...when you notice those signals, YOU need to be the one to step in front of her motion and ask her to stop.
You can certainly practice your cues on lead, as well, just so you know you are communicating effectively, but if it's free longing where you are having the issue, it's free longing that you need to work on your communication with.
Last edited by mom2pride; 06-07-2009 at 10:19 PM.