I've figured it out, thanks everyone for the help.
In Fryrender I can achieve single glass by using the ghost glass as cadmunkey mentioned.
To change the colour of the glass I used layers, it seems everything not basic in fryrender is achieved with layers.
If there is such a thing in Indigo I am guessing that is how it would be done as well.
Thanks a lot guys, I now understand it all.
Real renderers like Indigo and Fry will not render the faces properly.
but I have not been able to find the thin glass equivalent of Indigo.
btw I think in Indigo,how do I change the colour of the thin glass
I don't think I was ever able to do it.
This is what I find strange, it seems few people use Fryrender, even though the quality is far better than many of the render engines I have used.
It has a better quality than
SU Podium
Kerkythea
Artlantis
Hypershot
Indigo
IDX Renditioner
I haven't used Twilight or a few others
but the only ones I can think of with better or equal quality are maybe Maxwell and Vray.
**Does anybody here use Indigo? because it is the same issue I had with Indigo
I can render double faced (close geometry) glass, but not single faced.**
All Glass in the Model is one faced
Except for the Balcony Glass Which is two Faced.
Is that the problem?
I will try post the model without all the extra stuff so that it is 4mb
but that's the thing I don't have back faces.
Before I any of my faces, I always reverse them so that they are all white.
I don't know what is happening.
This is the same reason whay I stopped using Indigo.
This is the Monochrome style like you suggested
I tried to render coloured Glass, I edited the parameters as I saw fit, then when I realised that maybe I had no clue what I was doing, I used the presets.
but it didn't make a difference.
How can you go wrong with the presets. 
No Matter what I do, no matter how much I change...the Glass is BLACK
PLEASE HELP