M.R.
Get her evaluated by a neuropsychologist so that you know what is causing her issue, and find her a tutor that can teach her to read in an Orton Gillingham based alphabet phonics program. All children can learn to read with this kind of program, and you need to know exactly what other issues may be contribuiting to her problem so that you are not stabbing in the dark. The window of opportunity for learning to read closes around age 9, and a good alphabet phonics program will take at least a year, an maybe more if being administered outside the school setting.
M.