minibuffer-message doesn't display in minibuffer

[Matthew Calhoun]

Hello,

I'm using Emacs 21.1.1 on OS X, and I'm having trouble with 
minibuffer-message. Executing this function inserts the string argument 
into the current buffer instead of the minibuffer. If I execute:

(minibuffer-message "TEST")

in the scratch buffer, the message gets inserted at point in the 
scratch buffer, like this:

(minibuffer-message "TEST")TEST

instead of in the minibuffer. Am I doing something wrong or is Emacs 
doing something wrong?

Thanks,
Matt