Unable to transcode font

Hi,

I receive this error when embedding LucidaGrande in my adobe air application.

Exception during transcoding:Unexpected exception encountered while reading font file ...
Unable to transcode

I embed it like this:

@font-face {
src: url("LucidaGrande.ttf") ;
fontFamily: Lucida;
fontWeight: regular;
}

Curios is the fact that the bold works (i.e. does not throw error)

@font-face {
src: url("LucidaGrandeBold.ttf") ;
fontFamily: Lucida;
fontWeight: bold;
}

Any suggestion?

Thanks in advance,

-c.