I've just uploaded a new theme to make sure it worked and it worked for me so let's make sure you had the right set commands. Sorry if I'm repeating info you already know.

Each set command for each mood must look like this:

moodtheme_setpic ##### 108 http://www.yoursite.com/artistic.gif xx yy

#### being the ID of your mood theme that you got when you did moodtheme_create.
108 is the number of the artistic mood (every mood has a different one).
xx is the width of the icons.
yy is their height.
No blanks are allowed in the URL.

Is this what you got?

Edit: just to check you have the right number for the mooods: accomplished is 90 and angry is 2. Is this correct in your file?