UICSCControls Protocol settings FSX version RTM SP1 SP2 -- Acceleration Prepar3d SP2 XPACK Steam FSX (older) Steam FSX (new) You need to install SimConnect SDK for your FSX version. For the Steam version, choose SP1 in the above combo box. simconnect dll load failed -- %1 can't load SDK -- check selected simconnect version FS2004/FSX simconnectDll Microsoft FSX SimConnect