(require 'cl) problem

[It's me FKtPp ;)]

The Emacs Lisp Programing Standard said:
,----
| 
|    * Please don't require the `cl' package of Common Lisp extensions at
|      run time.  Use of this package is optional, and it is not part of
|      the standard Emacs namespace.  If your package loads `cl' at run
|      time, that could cause name clashes for users who don't use that
|      package.
| 
|      However, there is no problem with using the `cl' package at compile
|      time, for the sake of macros.  You do that like this:
| 
|           (eval-when-compile (require 'cl))
`----

But when i test this piece of code (byte-compile and restart emacs and
load the elc)

,----[ test.el ]
| ;; just want to test cl
| 
| ;;; Code:
| 
| (eval-when-compile (require 'cl))
| 
| (defun fktpp-test-case ()
|   "test cl library"
|   (interactive)
|   (message (if (oddp 22)
|              "yes it's odd"
|            "no it isn't")))
| 
| (provide 'test)
| ;;; test.el ends here
`----

it always tell me the symbol oddp didn't defined. why ? Is there any
thing illegal in my code?