[RESOLVED] Customizing the Ribbon - Excel

[FishGuy]

I have a VSTO application and I customize the ribbon to add my own buttons using the code below.

 protected override Microsoft.Office.Core.IRibbonExtensibility CreateRibbonExtensibilityObject()
        {
      return new ReportsRibbon();
        }

I also have a button which opens a new workbook (without the custom ribbon).

My problem is that when the new workbook is opened the original one also loses the sustomised ribbon items, is there a way to prevent or handle this?