Hi there... are you getting a email notification or a little "pop up" message?
The best way to monitor posts is through email notification - but you have to enable it -
Click on "User CP" at the top of the page...
Click on "Edit Options"
Make sure you have "yes" selected in the Use 'Email Notification' by default? box and the yes selected in the "Send you an email when you receive a Private Message?" box
Select No for the "Pop up a box when you receive a Private Message?"
Also when you click User Cp - you will see a link called "Private Messages" click it to see if someone has messaged you.
Good Luck
>>^..^<<