Embedded font problem on XP

I have a problem that’s drivin’ me nuts. I have embedded a font which I load via a CustomTypeface. Works fine on Vista, but on XP I have a most strange problem: As soon as I try to change the size or boldness of the font, I wind up with the windows default font. I.e. the custom typeface gets ditched. Help !? :cry:

Edit: It is only if I set another style for the font that this happens. Sizing works fine.

Edit2: Hmm… since the embedded typeface was not bold, I suspects that’s why it doesn’t work. So I installed two sets of the font, one plain, one bold… :?