Q:

The CSS style is not working

I am trying to use CSS within the HTMl document but it does not seem to work i tried using it externally as well but it did not work then either.  I don't know where its going wrong it should create like a green box 960px wide and 200 px height at the top of the page but its not doing anything 
<! DOCTYPE html>
<html>
<head>
    <title>Xbox UK Home</title>
    <meta name=“description” content=“Xbox is a gaming console created by Microsoft”/>
    <meta name=“keywords” content=“Xbox, games, Microsoft, Xbox Live” />
    <meta name=“robots” content=“nofollow” />

<style>
#header {
width: 960px;
background-color:#006400;
height: 200px;
}
</style>

</head>
<body>
    <!— -Main Header—->
    <header id=“header”> </header>

    <!— -Second Header—->
    <section> </section>

    <!— -Main Image—->
    <section> </section>

    <!— -Box One —-! >
    <Section> </Section>

    <!— -Box Two —-! >
    <Section> </Section>

    <!— -Box Three —-! >
    <Section> </Section>

    <!— -Box Four —-! >
    <Section> </Section>

    <!— -Box Five —-! >
    <Section> </Section>

    <Footer></Footer>

</body>

A:

You have <header id=“header”> </header>
get rid of the microsoft quotes
"header"

