[Sound, SoundThemes] No errors, yet no sound.

[HarmonyOfSynthesis]

Hello, currently trying to get my UI to have sound within it.

Here is the code for the Main Menu UI

class HoV_GFxMainMenu extends GFxMoviePlayer;

defaultproperties {
	WidgetBindings(0) = { ( WidgetName = "myButton", WidgetClass = class'GFxClikWidget' ) }
	SoundThemes(0) = { ( ThemeName = default, Theme = UISoundTheme'UDKFrontEnd.Sound.SoundTheme' ) }
}

My UI map is a map with a player spawn, no lights, and just a Kismet to open and play the GFxMovie, with the above class as my player.

The UI just consists of a button in the middle with the instance name of 'myButton'.

When the map loads, I don't hear any roll over sounds from buttons or click sounds.

Any thoughts on what might be my issue?