404 Error while accessing the font files

Please use short path file url rather then absolute path.

So code is like:

@font-face{ /* for IE */
font-family:FontFamily;
src:url(Font.eot);
}
@font-face { /* for non-IE */
font-family:FontFamily;
src:url(http://) format("No-IE-404"),url(Font.ttf) format("truetype");
}

Make sure that readable web has released it’s first @font-face related software utility for creating natively compressed EOT files quickly and easily.

If this is not your solution then you need to check https://stackoverflow.com/questions/4015816/why-is-font-face-throwing-a-404-error-on-woff-files.