Some members have had troubles with the mood functions when using Google Chrome.
What browser are you using?

Here is another thread with discussion of the Mood function-
http://neurotalk.psychcentral.com/thread164162.html

then at the bottom of that page is more threads to look at if none of the first thread helps you.

Basically you click the My Mood area in the upper right corner by the Welcome *username* and a drop down of choices should appear.

Welcome, Jo*mar.
You last visited: Today at 07:51 PM
Private Messages: Unread 0, Total ***.
My Mood: