I have bought a LG Home Theatre System DH7520T. In the manual it says that I can unlock the regions through the menu, and there is indeed a place where I put in my password and change the region. But it doesn't really change the region as I can't still play the DVD's in the new region I have chosen. Is there any way to break the lock? I don't know which one is the model for the DVD player included to the system, so here are the model numbers on the manual: DH7520T, S72T1-S/W, S72B1-C I really appreciate all the help. Thanks in advance.