To be blunt, Little Chess Partner isn't that great. It is claimed that its full strength for members is ~2500. I find this hard to believe when I play against it and considering some of its analysis. It seems ok on tactics, but it labels way too many moves as "inaccurate". Take it with a grain of salt.
Besides, there are lots of engines out there that are cheap. There is also an excellent free version of Rybka.
What's little chess partner's rating on easy, medium and hard?