Flex Multi Fonts with one family name

[WaelBaidousee]

Hi,
I have problem in fonts with different Unicode ranges,
where I have spark label which will contain English and Unicode characters.
so I want the English characters to take font 'NeoTechMedium.TTF' and the Unicode to take the font 'GE_Dinar_One_Medium.otf'. so What I did that I created 2 embedded fonts with same font family and different Unicode ranges as following :
/*---------------------------------------------------*/
@font-face {
src: url("/assets/Fonts/GE_Dinar_One_Medium.otf");
fontFamily: TestFont;
unicode-range:U+0600-U+06FF,
U+FB50-U+FDFF,
U+FE70-U+FEFF,
U+0020-U+007E;
}

@font-face {
src: url("/assets/Fonts/NeoTechMedium.TTF");
fontFamily: TestFont;
unicode-range: U+0020-U+007E;
}
/*---------------------------------------------------*/

and then I created a CSS class with font-family as following
/*---------------------------------------------------*/

.LiveSupport
{
fontFamily: TestFont;
font-size: 20px;
color: #642b7f;
}
/*---------------------------------------------------*/

and then I gave the label stylename =LiveSupport

<s:Label text="MMMMMMMMMMMMMMMسيسيسيسيس" styleName="LiveSupport"/>

but what happened that, the font was applying only to the unicode characters and for English characters nothing happened.

also I found that, if I changed the fonts order by put English font first, the English characters take the font and the Unicode characters lose the font.
so what is the problem here and how I can fix it.
please any help or hint.
thanks in advance.