Email submit does not launch Outlook which is set as default client

I designed a form in Adobe LiveCycle and added an Email Submit Button.  When I saved the finished form as a PDF and clicked the Email Submit button to test the form (after filling it) it returned an error as follows: "Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client".  My default email client is Microsoft Outlook 2010.  Meanwhile when i click on other mail to links elsewhere, even on a webpage, Outlooks launches automatically.  Any help??