why does clicking on my “contacts” cause Live Mail to become unresponsive

I am using windows 7 and Live Mail.  I have found that whenever I attempt to access the contacts, whether to add to an email, or to just try and delete or edit my contact list, this causes the program to freeze up and become unresponsive.  I have lost several long email compositions because of this and it is very frustrating.  I have followed some links and tried deleting the contact cache without success as far as fixing the problem.  I have also unassociated social media, such as facebook, with Live Mail with negative results.  Please help with this frustrating situation.