UICSCControls Protocol settings FSX version RTM SP1 SP2 -- Acceleration Steam FSX (older) You need to install SimConnect SDK for your FSX version. For the Steam version, choose SP1 in the above combo box. Prepar3d / SP2 XPACK Steam FSX (newer) simconnect FS2004/FSX dll load failed: %1 install FSX SDK can't import %1: %2 simconnect_metadata Microsoft FSX SimConnect