We calculate the scattering amplitudes of Goldstone bosons off the pseudoscalar D mesons in the unitarized heavy meson chiral approach. The low energy constants appearing in the O(p(2)) chiral Lagrangian are determined by fitting lattice simulations on S-wave scattering lengths. D-s0(*)(2317) is obtained as a bound state in the (S, I) = (1, 0) DK channel. Possible bound states or resonance states in other channels are investigated as well. The quark mass dependence of the mass and binding energy of D-s0(*)(2317) is also investigated, which indicates predominately DK molecular nature.