Kerning and Features not working in Word 2010

[eWalthert (Edgar Walthert)]

Hi, I’m new in producing extensive fonts with Glyphs.
So I’m sorry in case I did not find the right tread.
I did look at this:

Differences between kerning in Adobe Creative Suite and Word

After exporting the file, either otf or ttf, the font seems to work fine in Illustrator or InDesign, though there are updates to the kerning which do not come through in Word or Powerpoint - where the client will be using the font. I have tried clearing any cache issues as per 2.10.6 of the Glyphs Handbook, and have moved to Suitcase Fusion 5 instead of Font Book. Please help!

and this:

Kerning Problem in Microsoft Office

My font has been exported properly and works fine in any Adobe software but when using it in MicroSoft Office the kerning that I fixed within glyphs does not work. Please help me rectify this. Thank you! Rc

However, I’m testing a font family, that has automatically generated features and is fully produced according to the Glyphs play-book. Yet features and kerning do not work in Word 2010. The features are even greyed out.
I would drop it and blame it on Word, if I would not have fonts, produced with the AFDKO and even files from a friend produced with same version of Glyphs on my computer that just work fine. The features are similarly complex.

Any idea where to start?
I did disable all features. > Still no Kerning.
Tested with only one simple feature enabled. > still grey OpenType Features
I mimicked the naming-structure of the working fonts > no luck.

Could it be related to the fact that the fonts have only 225/242 Mac Roman and 211/217 Windows 1252 glyphs?

Thanks in advance for every tipp,

Edgar