Sorry,this ticket has notbeen answered. The ticket you are referring to only says that CS does not offer support for multiplayer issues.
So why not ask in the forum, maybe someone else had this problem and found a solution.
I do not share the cockpit; FMC/CDU works as usual, all instruments show up and are correct (except for the firebell, but it doesn't work in SP either).
On our server 2 other player with CS 757 have the same issue, but, as I said earlier, also on other servers.
Could it maybe have to do something with localization? All ppl I know having this issue live in germany.