Reply to the comments of Karami on the Interacting holographic dark energy model and generalized second law of thermodynamics in a non-flat universe

In [arXiv:0911.4808] K. Karami commented on my publication [arXiv:hep-th/0701242] and claimed that my result would be invalid. In fact he found an error in calculation of the entropy of cold dark matter in section 3 of my article, which is, however, a rather trivial one. It is shown that my discussion in section 3 of my paper works correctly if we take the value of free parameter $b^2>0.264$.