scenario issue

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I need some help on a scenario WF. "Bravery resistance on the Kalamas". Trying to get this off the ground with an opponent. The allies are not showing any artillery. They are on the board but when I try to plot them the message says no artillery. My opponent says he can't fire the 75mm allied artillery. 

Another player tested his files and he was able to plot allied artillery. We all got the files from the download here. I don't think the source is the problem. So I asked the player to send me a copy of his working files. But they show the same on my computer. Can't plot allied artillery.
There is no problem with the Axis artillery plotting.
All I can think of is My game files for west front is missing something. Also my opponent is seeing the same thing. The allied artillery is on board but can't plot them.

But yet the other player I contacted he has access to allied artillery. Ran a virus check on my CS Tiller files. It was clean of viruses
Any ideas.

I should add no other scenario I have played has this problem in either WF or EF.

Just thought of this possibility. Could it be the Greeks need a file that is not present in my opponents and my game files?