Question about @font-face

I like to use the bliss font on my web site - www.bigalsoftware.com  .
The font is displayed in Internet Explorer but  not in Mozilla or
Firefox.   

Here is a snippet of my CSS file. Interent Explorer makes use of the
Bliss-1 font I defined in in the @font-face.   Mozilla and firefox use
the  Time New Roman font. 

How can I use the bliss font in  Mozilla or Firefox?

Thanks

Al

@font-face {
    font-family: Bliss-1;
    font-style:  normal;
    font-weight: normal;
    src: url(BLISS3.eot);
}

@font-face {
    font-family: Bliss-2;
    font-style:  normal;
    font-weight: normal;
    src: url(http://www.bigalsoftware.com/css/TT_BLISS.TTF);
}


h1, h2, h3, h4, h5, h6 {
   text-align:center;
   font-family: "Bliss-1", "Bliss-2", "Times New Roman", sans-serif
}

p.first_letter:first-letter {
   font-family: "Bliss-1", "Bliss-2", "Times New Roman", sans-serif;
   font-size: 28pt;
}

Al
http://www.bigalsoftware.com