Harry Potter and the Deathly Hallows question?

Okay, if Dumbledore dies in the Half-Blood Prince, and the curse he had placed on Harry (under the invisibility cloak) lifted when he died, how come the protective enchantments Mad-Eye Moody placed on Grimmauld Place didn't lift when he died (e.g. the dust turning into Dumbledore, the Tongue-Tie curse..)?