Hello,
When I export the otf file, it works perfectly. However when I press the space bar to see the file, in bold weights the numbers do not appear. I attached a screen shot. It is a detail, but I saw other otf files and the preview works fine. 
That is a bug in Quicklook, has nothing to do with the font. Sometimes it works, sometimes it does not. Do not put too much value on the Quicklook preview because it can show a cached and therefore outdated picture.
Ok, thanks for the prompt response.