Embedding unicode font problem

Hi All,
       I am developing a flex application for Tamil language. I want to use tamil text in all the controls.
When I embed a tamil unicode font with the application, it doesn't render the text properly because of the glyphs.
@font-face {
            src: url('assets/latha.ttf');
            font-family: 'latha';
            unicode-range:
            U+0054-U+0054,
            U+0061-U+009F,
            U+002E-U+002E,
            U+0B80-U+0BFF;
        .MyEmbeddedFont {
            font-family: 'latha';
            font-size: 18px;
Is it possible to render the glyphs fonts correctly in flex?
Can any one help in this?
thanks in advance

Thanks for your reply.
The embed font is working fine. The tamil characters are displayed in controls if it doesn't contain any glyphs. It is the problem only with the glyph characters.
The used font contains glyphs and works well in other platforms.
In my flex application the glyphs are rendered incorrectly.
I tried the recipe that you have written in the cookbook. But it is not resolved?
Do you I need to update any settings in the compiler?
Or I anything need to be added in the code?

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