I agree with the other ladies, she will do it at her own time...

My two were completely different when it came to all these milestones, DD2 was a lot faster Crawling at 4months, walking at 8.5months, DD1 however was crawling at 6-7, and walking at 11.

you could do some positive reinforcement so if you see her take a few steps make a fuss at how clever she is, see if she will walk between you adn Dh - be close together at first and then move away.

She will eventually walk ;-D