When she does not want to move try making her give to the bit one rain at a time. As soon as she gives make sure you give her a quick release count to three and then make her give again. Keep on repeating until her nose is almost at your knee then hold it there. Work both sides. Eventually her neck muscles will start to tire and she will move. Whenever she moves forward release right away. As soon as she stops repeat. It may take her 20 min. to make that 1st forward step, but this technique really does work. She will soon realize that it is a lot more work involved standing still than moving.
Good luck with her!! She looks like she is doing great! I have two 2 yr olds to break out this year. LOL they are a lot of fun! I used to run barrels, show english, western, jumping, ect... Now I just break and train.