So from which website can I download maps?

I tried from epicrage but just doesn't work. I download the map and it's supposed it should work with world editor, but doesn't. Maps I've dowloaded from bnet are Warcraft III Scenario File files, and epicrage's are w3x. Should they work with world editor even if they are w3x files?

So I wonder what I'm doing wrong and how can I fix this.

Thanks.

Some maps are protected to make people unable to look at their maps in world editor.

try google warcraft 3+ maps or sth like that. it will be there im sure