Why can't I get gas to our gas fire place?
I have no advice at this point other than to contact a professional, seeing as that you've probably tampered with what I assume is the flame adjust, 'trying' it the other way could prove disastrous.



Ok, the picture shows that's not a FA valve but I've nothing more to add without a response to BMitch's comment. - Which I forgot to mention that if both of those are a yes (as you say), I'd still be at a loss.

Shot in the dark: (I've never seen this happen but I guess it could) The packing nut on that valve is so old and deteriorated that it's blocking the flow of gas even when 'on'. Also, the fact that the valve is inside the chamber doesn't seem right to me.

Don't forget to open the flue if you get it working.