Re: Grr . getting miserable!!
i havent seen you ride but, you might possible be taking your leg off too early, i had a pony very similar to what your saying, you need plenty of leg to encourage her and to give the confidence to go over, even if its pony club kicks! Remember also not to give your hands away, you could be coming up to the jump being over enthusiatic and droppping your hands at the last minute, keep them strong with good contact, keep looking beyond the jump, not at it, if she is lacking in confidence you need to provide it to her through your riding, id keep low, as for schooling, id work with poles, then put i tiny cross at the end and really build up to there, grid work has been so beneficial to all my horses, whether they are right devils or an honest gg that just needs to be taught what to do.
Also never circle away from a fence if she refuses, make her go over it, or through it, doesnt matter, poles will fall and it wont hurt. But circling away reinforces the run out or choice to refuse if she goes over it someway or other it at least your on the other side.
Best of luck!