FF Ignores CSS Options

[homeuser]

I am helping someone with a website. We want to have the first letter of the first paragraph larger and in a distinctive font.This is the CSS link:
<link rel="stylesheet" type="text/css" href="css/firstbigletter.css" />

This the external CSS:

.firstbigletter {
font-family:"Typo Upright BT", "Times New Roman", serif;
font-size:45px;
font-weight:normal;
line-height:80%;
letter-spacing:-6px;
}

Control Panel - Fonts shows that the first font is there (see attached). But FF won't recognize it and displays the letter in what appears to be Times New Roman . IE does recognize it and displays the first character in the Typo Upright. What must be done with FF to get it to properly use the CSS?

Thank you.