Added note: the artillery module seems to function correctly.

I spotted this and found it strange. I assumed they had attempted to invent some form of word to mean "of Altian origin."

Your fps converges towards the server fps to an extent dependent on the way the server administrator has set up certain parameters in the server config. The low fps in multiplayer is largely caused by poorly optimized missions, running on underpowered servers with far too many players. This said, even on well optimized missions the server fps is capped at 50 and in reality server fps over 40 is unachievable in any missions with substantial content. Thus you can expect your fps to be considerably lower in multiplayer if you are lucky enough to enjoy high frame rates in single player. You have to understand the above facts in order to comment on multilayer performance.

I suggest you provide the make and model of your graphics card and also the version number of the drivers you have installed for it.