I just bought a new computer. Before I was using Windows XP and Outlook Express. Now I'm using Windows 7 and Microsoft Outlook. All my email contacts and information was switched over by the place I bought my computer. I have 6 goups of contacts to which I send email newsletters. 5 groups work perfectly. One of the six groups does not send, but gives me the error message "An internal support function returned an error". What could possibly be the problem that one group would be different from the other 5? All worked fine before this change.