How long from standing unsupported to walking?

My LO is a very good bum shuffler and therefore has only been walking (around furniture and holding your hands) since she was about 11m. She's now nearly 14 months and is no furtyher foward, she is getting stronger as can now walk only holding one of our hands, but each time we try and get to walk unaided, she drops down on to her bum again and shuffles...will she ever walk??

Any ideas to encourage her?

Thanks