I have to find this movie

There was this movies about an old lady who had a granddaughter who was a babysitter and this lady was always staying in her basement. The kids were a boy and a girl who were not siblings and their parents were divorced. And then 2 guys came to rob the old house because the old lady had a lot of money hid in the walls and the kids were going through the vent. The kids were communicating via walkie-talkie. I think i saw the movie on Disney but I am not sure. The year was max 2010 when i saw this movie. I think the FBI was looking for this lady and at the end of the movie they caught and the parents of the 2 kids stayed together.