Since changing my broadband supplier, I have had trouble with Windows Live Mail.  I am not getting Incoming Mail (although I do get it on my tablet) and yesterday I repaired Windows Essentials.  Same problem again today and now I cannot get into Live Mail at all.  I click on the icon and, after a few seconds, the 'circle' stops and nothing happens. I have tried contacting o2 and BT but get nowhere.  Any ideas?

[Original title: Windows Live Mail 2012]