Contextual Alternates- Webfont

Hoping for some wisdom on this…

I have built a font chocked full of contextual alternates. The problem arises when trying to get the alternates to work when using the @font-face property and the font as a webfont.

Any ideas as to why the alternates are not working? I know that browser support has been sparse in the past but that recent browser updates/developments do support the use of this feature.

Much thanks in advance!

Though a year old, now, you may want to review Typotheque’s articles on OpenType support in web browsers: