Hide a measure group in excel 2007 'Show Fields Related to'

Hi All,

I know that if a I want to hide a measure group to users I have to set the properties 'Visible' to false for all the measure of the measure group.

But when I open a connection to the cube with Excel 2007 I see again the measure group in the drop down list 'Show Fields Related to' in the 'Pivot Table Fields List'.

I don't see it in the measure group list when I choose 'All' in the 'Show Fields Related to', but i don't want to see it in the list 'Show Fields Related to' too.

How I can do to hide permanently the measure group?

Thank you all,

SimonaP