ActiveX -- Saving Excel File

Hi!

I have an excell sheet who auto refresh data from web when I open it. I want to open the file, save it and close.

I can open, and close but not able to save it...

this is my code

% Create object.

ExcelApp = actxserver('Excel.Application');

ExcelApp.Visible = 0;

% Open file located in the current folder.

ExcelApp.Workbooks.Open(fullfile(pwd,'\Niveaux.xlsx'));

% Make the first sheet active.

eSheets = ExcelApp.ActiveWorkbook.Sheets;

eSheet1 = eSheets.get('Item', 1);

eSheet1.Activate;

ExcelApp.Saved=1;

ExcelApp.Quit;

ExcelApp.release;

I try many things but dont find a good solution... Thank guys for your help

Matlab R2013a,