Hi Carmela's mom. Could I please ask what the ignore method is? I assumed from your post that she wakes at 3am and wants to be up for the day? Does she cry or call out for you in the night or happily play in bed? When ever I've needed to help my ds sort out his night time issues I've taken the BW way which is responding to him to get him through the phase that he's going through. It may seem that it doesn't work or taking forever, but what I've usually found is that more wakings during the night can often be attributed to "needing" me more during the daytime - so it's like he's transferred his need to get the attention some other way - does that make sense? Just something to think about anyway.
What I would suggest is going right back to basics with her. Have a good bedtime routine. It sounds like she goes to bed happily which is GREAT! But EVERY time she calls out for you during the night (even if she wants to be awake at that time), respond immediately, don't try and wait for her to go quiet, because I think if there's a need (even if you don't consider it a need), she's not going to go quiet, if she does it's more going to be giving up but her need is still unfulfilled. Keep things low key, no lights on, no talking to her and leave the room, if she calls out, go straight back in and repeat. This can be a long process, but if her trust has been broken at any point, you will need to get past that before she will feel comfortable sleeping through. This could take quite a few weeks and you will need to be absolutely consistent in your response to her to gain back her trust to know that you will go to her if she needs you. I'm not saying her trust has been broken as I don't know your situation, but just something else to consider.
If you have the BW book there is a plan on gently removing yourself from the room (ie sleeping on the floor next to her to get her back to sleep). Personally I think the key is GETTING her back to sleep during the night - don't worry too much about how at this point. You want her to be well rested and on track with napping during the day and around 11hrs at night. Once you've got that going then you can remove yourself from the picture, it will be tough time, but you need to be consistent with it. Please don't try the CIO method which could end up damaging the situation further.
HTH