I created several functions i.e.: "cal\_adval". I would like to add it to a new function category named "Custom Clearance"

I read [the documentation](http://msdn.microsoft.com/en-us/library/office/ff838997%28v=office.14%29.aspx), and wrote this macro:

```
Sub add_category()

Application.MacroOptions Macro:="calc_adval", Category:="Customs Clearance"
Application.MacroOptions Macro:="calc_fodinfa", Category:="Customs Clearance"
Application.MacroOptions Macro:="calc_vat", Category:="Customs Clearance"
Application.MacroOptions Macro:="calc_liquidation", Category:="Customs Clearance"

End Sub

```

However I got this error: `Method MacroOption of application failed`. Any suggestions?