As you've found out, the Form Wizard in 2007/2010 groups all Fields together, and in order to do anything to these individual Controls, you first have to 'Remove the Layout,' as described! In addition to what you were trying to do, you'd have to do the same thing in order to perform any type of formatting to individual Controls, as well!
Glad you got it working!
Linq ;0)>
The problem with making anything foolproof...is that fools are so darn ingenious!
All posts/responses based on Access 2003/2007