Some czgtLDD assets include specific presets or plugins. Check the Plugins tab on your Person atom to see if a "Heel" or "Pose" plugin was included in the package.
Click and search for "14_set" or "czgtLDD" to locate the high heels. Select the item to apply it to your character. czgtLDD.14_set_high_heels.1.var
Clothing assets in VaM often require specific pose adjustments to prevent feet from clipping through the floor: Some czgtLDD assets include specific presets or plugins