How to hide Make Homepage button in SharePoint ribbon

Hi,

I have not been able to hide the Make Homepage button in the SharePoint 2010 ribbon while editing pages/default.aspx. Below is the custom action I'm using. Thanks in advance!

<CustomAction Id="RemoveMakeHomePageButton" Location="CommandUI.Ribbon" RegistrationType="ContentType" 
      RegistrationId="0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF39"><CommandUIExtension><CommandUIDefinitions><CommandUIDefinition Location="Ribbon.WikiPageTab.PubPageActions.SetHomePage" /></CommandUIDefinitions></CommandUIExtension></CustomAction>