[NTG-context] Fonts... bold smallcaps

Hi all, sorry for bothering you with this. I have a font Seravek-Regular.otf and Seravek-Bold.otf. It is actually my company font. Now I needed to use bold-smallcaps. But I can not get it working, though otfinfo tells, that in the bold font there are smallcaps In my typescript file I have the following two lines, from which the Regular variant works perfectly well. \definefontsynonym [SansCaps] [Seravek-Regular] [features=smallcaps] \definefontsynonym [SansBoldCaps] [Seravek-Bold] [features=smallcaps] I tried to get bold smallcaps with \bf\sc but without success. Can anyone point me what to do? Kind regards Willi