Windows 7: Cannot Config Host file

My problem is:
I config my host file to go facebook (my country prevent me to go there ) and It work probably to one day... I cannot go to facebook, and I checked my host file again. It's still no change from that time, but there is a small thing: host file now has a key icon at left-bottom. (That I'm sure it doesn't appear before).
So, help me , please.



thanks

That isn't your problem, your problem is your country.

Can you tell me more clearer, please. (I think your answer mean my facebook really cannot connect) But I have tested on other computer (that same same my computer, its'host file doesn't have key icon at left-bottom, and can connect to facebook smoothly, of course same network line).
So, you can explain for me, when key icon appear, and when not, please ?

thanks