[SNAFU]

I updated our server to the latest patch+hotfix. Now that I try to start the script with a custom menu part here:

 public override void OnOrderMissionMenuSelected(Player player, int ID, int menuItemIndex)
    {
        base.OnOrderMissionMenuSelected(player, ID, menuItemIndex);

I get the following error-message:

System.Exception: c:\Users\CoD Server\Documents\1C SoftClub\il-2 sturmovik cliff
s of dover\missions\Multi\Dogfight\July1940_v5\Mid-July1940_v5.cs(648,26): error
 CS0115: 'Mission.OnOrderMissionMenuSelected(maddox.game.Player, int, int)': no
suitable method found to override

   at xQOt3lDxHCKGfeHhoXG.nJNIchD1R4RKjSh4lUn.My577M09gxc(String , Boolean , Boo
lean )
   at xQOt3lDxHCKGfeHhoXG.nJNIchD1R4RKjSh4lUn.9XmBbrMFV79Tsq2ilpe2(Object , Bool
ean , Boolean )
   at xQOt3lDxHCKGfeHhoXG.nJNIchD1R4RKjSh4lUn.nbX77R2S1p9(String )
   at xQOt3lDxHCKGfeHhoXG.nJNIchD1R4RKjSh4lUn.x4r77gG5cLs(String , Int32 )
=================================================

=================================================
System.Exception: c:\Users\CoD Server\Documents\1C SoftClub\il-2 sturmovik cliff
s of dover\missions\Multi\Dogfight\July1940_v5\Mid-July1940_v5.cs(648,26): error
 CS0115: 'Mission.OnOrderMissionMenuSelected(maddox.game.Player, int, int)': no
suitable method found to override

   at xQOt3lDxHCKGfeHhoXG.nJNIchD1R4RKjSh4lUn.x4r77gG5cLs(String , Int32 )
   at 63fmYDM6scICdbkX6oX.OEMHv2MNfTXdfmmeGsD.W7nkOAKl9N(P3dcOOwRZQwsaaAbPNR )

That worked fine before I patched... and still works on my PC, where I still used the unpatched version. Only our dedi is patched.