First of all, you need to check the settings in your unit if you can manually set the path to Navigation which is on an SD card. Usually that is a standard feature of Chinese 2-din head units with navigation. In that case you can have any name for the navigation folder and exe (for example iGO folder with iGO.exe inside). But in case you cannot set the navigation path manually, then you need to figure it out which is the correct naming of the navigation folder and its exe file...but judging from your info regarding the name of the exe file (igo9.primo.exe) you can set the path manually since what you had it's far from any standard naming.