the change font size & colour has gone dim and no longer works in windows live mail ,how do i restore it to its default please

Hi I have Windows Live Mail  & Hotmail  as my email accounts,  and i am running  Windows 7 on my pc.   They have been working fine , but  the select font size  and font  colour , bold, underline  etc.  small  square  at the top righ of the page  as gone  faint ,   and wont  work, can you tell me how to restore it to its original setting , as it was when it was working .  Although I can still send and recieve emails  I am stuck with only  the one size and colour option ,   Your help would be very much appriciated  ---thank you----Dennis Goodwin