LISP Error, need help

Our survey department neets to add mtext that is justified middle center with a zero width. I have not used LISP resently and cannot figure out what I am missing.

(defun C:lbl ()
   (command "-mtext" pause                                    ; Activates mtext command
      "Columns" "N"                                                   ; Removes columns
      "Justify" "MC"                                                    ; Middle-center justified
      "Width" "0"                                                       ; zero width
    )
)

When I run this command I get this output at the command line:

Command: lbl
-mtext Current text style:  "SIMPLEX"  Text height:  0.0600  Annotative:  No
Specify first corner:
Specify opposite corner or [Height/Justify/Line 
spacing/Rotation/Style/Width/Columns]: Columns
Enter column type [Dynamic/Static/No columns] <Dynamic>: No columns
Invalid option keyword.
; error: Function cancelled