Baloon messages constantly unchecking itself.

??? Hi Guys. This may have been covered at some point in the past but i have been using Full Cis suite on windows 7 32 bits for over 2 years now, and in preferences you can check the box to enable baloon messages in the Gui.Well lately it is unchecking itself and i click it over and over again and then it unchecks itself.Anyone have any idea what causes it and how to fix it please.