App not available,how to unlock market?

May 4, 2011
Hi,i'm using MIUI 1.3.18 on my acer liquid.
I can't find on the market the app NHL Gamecenter,it's says that is not available for my country.
I've already tried to unlock market using Malez recovery,it's says that market is unlocked.So,what can i do ? I've only this problem with MIUI Roms.