Due to this, you will need to use the "Audio Mode" of the HF8. This can be toggled by clicking on the "Audio Mode" text within the HFS software, and ensuring that it is RED in colour.
Alternatively, you would need to make use of the "Virtual Sound Card", which will use the audio signal from the game to provide feedback through the motors. This can be done by navigating to "Other Games" from the drop-down menu, then selecting the "Virtual Sound Card" thumbnail and ensuring that the effect has been turned on.