Excel/Outlook 2007 vba code doesn't work in Excel/Outlook 2010

Hi all,

My company recently upgraded everyone to Microsoft 2010 from 2007 version. I have no substantial VBA skill and left with a VBA code which is supposed to extract a list of outlook emails sitting in a shared mailbox into Excel. I was using that VBA code in Outlook 2007 and it worked fine but shows the following error when run in Outlook 2010: 'Run-time error '-2147221233 (8004010f)': The attempted operation failed. An object could not be found. Here is part of the code:

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It worked after one of the members suggested to "click on any line of this code and press F8 repeatedly until the yellow focus moves to the error line, don't press F8 anymore. Now in immediate window, copy paste each of below lines, press enter after each line. Let us know where the error occur." However, it stop working the next day. Any help would be greatly appreciated. Thanks! - Evelyn
? olNS.Folders("Mailbox - Market Intelligence").Folders.Count
? olNS.Folders("Mailbox - Market Intelligence").Folders("Inbox").Items.Count
? olNS.Folders("Mailbox - Market Intelligence").Folders("Inbox").Folders("MI").Items.Count

Hi, I have already ticked all the suggested boxes and it still doesn't work.