Solving for A and B , system of equations.

I'm doing something wrong with my algrbra could someone show the steps to solve for A and B? (In terms of β,b,k, and m)

A(k −β² m) + Bβb = 0
B(k − β²m) − Aβb = 1

Mind you, I can't be positive this is right. But, it might help ^-^ You can check it out~

Work:
http://i1097.photobucket.com/albums/g346/Shei431/Images/solve_for_A_and_B.jpg