Windows live mail wont open new message, reply or save contacts

Hi all... looking for any help please..

Problem is... Windows Live Mail.

i have 3 different email address that come into it.. 

I can receive emails in, but when i go to reply i cant, 

when i go to new email - i cant

when i try to save a contact - i cant. 

it worked fine about a month ago but just stopped all of a sudden.

so annoying..

i get the message saying 

A problem occurred while trying to open this message.

A problem has occurred. Please Try Again..

i have tried to do the whole FIX/REPAIR on windows essentials.

i have tried by un-installing and re-installing but still wont work..