Can no longer access my Outlook In-Box from My MSN when I log in via the MSN butterfly icon.

For the past few days, when I log in to MSN using the butterfly icon, the My MSN.com window opens.  But within that window, when I click on my Outlook.com Inbox it takes me to www.bing.com/search, which is bizarre!!!  Currently, the only way I can access my Outlook Inbox is by logging into Internet Explorer via its icon, and not logging in via the MSN butterfly icon.  Interestingly, I also still have Spell Check while writing emails in Outlook when I log in via Internet Explorer.  Before I became unable to access email in my Outlook Inbox from My MSN, Spell Check had been missing again for a week or more.  All these problems AFTER having installed MSN Explorer 10.5, which was suppose to be better???   NOT AT ALL HAPPY ABOUT THIS...