CSS Issue: <hr> line not showing in non-compatibility view in IE 8

I am having an issue with开发者_如何学C <hr> in IE8 (normal view) This is my CSS styling for that:

#ViewName hr
{
    background-color: #CCCCCC;
    border: none;
    font-size: 14pt;
}

I can see the horizontal lines in IE8 (compatibility mode) but not in normal mode. What is going on here?

Border has to be 1px minimum for hr to work in IE8.

#ViewName hr
{
background-color: #CCCCCC;
border: 1px;
font-size: 14pt;
}

This is not the issue in IE9.