TAB Shortcuts

[realife]

I’m using sublime text as my editor and when i’m writing code in HTML such as

<div class="header"></div>

So there was a shortcut that i’m typing like that

.header

and then clicking TAB and it automatically make it, but suddenly it’s not working, do you have any idea?

[satie]

github.com/sergeche/emmet-sublime

[realife]

It’s already installed…
It worked for me before, I didn’t do nothing and now i don’t know what it’s not working anymore…