The KVNY airport from Orbx does not include the ILS runway (16R) frequency (111.3) in its navigation data. By installation, its own data will over-ride the default (or even Navigraph) data, thereby rendering a missing component to the selected GPS system. The new WT G1000 NXi GPS in MSFS is capable of vertical-mode RNAV (area navigation with vertical tracking all the way to the runway) . It can, if ILS is chosen, use an approach mode using the ILS localizer (wherein it switches to the localizer at the close approach to the runway. In the Orbx KVNY (Van Nuys) code included with your product, the ILS frequency is missing. Thereby, the automated descent into the runway ends just where the ILS should engage (automatically) with the new G1000 instrument. I sugget that Each of the Orbx airports should be upgraded to include the nav data required to use the new MSFS GPS systems. Within just a few months from now these will include the G1000 (NXi), G3000 , and perhaps others.
Dave