I am trying to create a Syriac Font. After I create a regular Unicode font using the font creator I added all necessary Syriac required glyphs, and then I used VOLT to create an open type font, but after shipping the font, it does work. When choosing Syriac to write from right to left it turns to the windows default font. 
Hi,
I don’t have any experience with right to left scripts, but if you like to archive your font and attach it here I will take a look at it. Maybe later one of our members who knows about such fonts will be able to help more.