Question about a:hover link color

Hello,

I have several links on my website.
When I hover over some of them they turn red.
Which is what I want.
However some links do not turn red when I hover over them.
With these links they only turn red when I hover over them AFTER I have visited then before.
I`m using a child theme which is working fine.
Is the problem the fact that I have the link code twice?
I have the link code from @import url(“../twentyten/style.css”); and I also have it further down in the child CSS file

The child CSS file code is included below:

/*
Theme Name: Twenty Ten Child
Template: twentyten
*/

@import url(“../twentyten/style.css”);

#site-title a {
display:none !important;

}

#site-description {
display:none !important;
}

#site-generator a {
display:none !important;
}

.entry-content,
.widget-area,
#container
{
font-family: Arial, Verdana, sans-serif !important;
}

a:link {
color: #990000;
}

a:visited {
color: #743399;
}

a:hover {
color: #ff4b33;
}

a:active {
color: #ff4b33;
}

Thanks in advance for your help

Douglas