I know I need to nip this in the bud now- I'm looking for advice on what to do when I get flat-out refusal when I ask her to move. Example: standing on cross-ties, ask her to move over with (appropriate) pressure on her girth area, get a blank stare and no movement. She's not being nasty, she's just completely ignoring. But I know that turns into nastiness, hence needing to deal with it now.
In anticipation of some of the responses, I'll say that I don't have a roundpen, and neither this horse nor I have ever been trained in the natural horsemanship techniques (and I don't have access to trainer or mentors with that background). I think this is probably a pretty basic problem that any training philosophy can address, and I'm not bashing or close-minded to different approaches, just saying that realistically, building trust in a roundpen is probably not something that will work in my situation due to my lack of equipment and experience.
I know this probably sounds like a basic question to most people, but this is the first time that I'm addressing problem behavior in my own horse- my experience thus far as been several years of riding broke horses, so this is a new (but welcome) challenge to tackle.