Ok I got a solution that works! for me at least, lets see if it works for you.
Create your line text, and it the properties, to a horizontal flip of the text frame.

Next attach it to the path shape you want. I your case the ring you are using.When you attach it it wont be right, the text base will be attached to the outer edge, but on the inside of it.Now go to the text dialog, and in the path text properties, second last option is flip text, click the selection box. Your text should be on a path the right way. Use the start offset to adjust where you want it along the path..