Problem about: Symbol's value as variable is void: x-max-tooltip-size

[????????]

When I use the command semantic-complete-self-insert, emacs tips an error: 

Symbol's value as variable is void: x-max-tooltip-size??

I am using macos10.6.8, Emacs23.4.1??and the configuration for cedet is like this??

(load-file "~/work/emacs/plugins/cedet-1.1/common/cedet.el")

(global-ede-mode t)

(semantic-load-enable-code-helpers)

(semantic-load-enable-semantic-debugging-helpers)

(global-srecode-minor-mode 1)

(require 'semantic-ia)

(require 'semantic-gcc)

(add-hook 'semantic-init-hooks (lambda () (imenu-add-to-menubar "TAGS")))

(defun my-cedet-hook ()

  (local-set-key [(control return)] 'semantic-ia-complete-symbol)

  (local-set-key "\C-c?" 'semantic-ia-complete-symbol-menu)

  (local-set-key (kbd "M-n") 'semantic-ia-complete-symbol-menu)

  (local-set-key "\C-c>" 'semantic-complete-analyze-inline)

  (local-set-key (kbd "M-/") 'semantic-complete-analyze-inline)

  (local-set-key "\C-cp" 'semantic-analyze-proto-impl-toggle)

  (local-set-key "\C-cd" 'semantic-ia-fast-jump)

  (local-set-key "\C-cr" 'semantic-symref-symbol)

  (local-set-key "\C-cR" 'semantic-symref)

  (local-set-key "." 'semantic-complete-self-insert)

  (local-set-key ">" 'semantic-complete-self-insert))

(add-hook 'c-mode-common-hook 'my-cedet-hook)

(add-hook 'c++-mode-common-hook 'my-cedet-hook)

;; (defun my-c-mode-cedet-hook ()

;;  (local-set-key "." 'semantic-complete-self-insert)

;;  (local-set-key ">" 'semantic-complete-self-insert))

;; (add-hook 'c-mode-common-hook 'my-c-mode-cedet-hook)

;; (add-hook 'c++-mode-common-hook 'my-c-mode-cedet-hook)

;; my project

(ede-cpp-root-project "Kingdom_Defenders"

  :file "~/Develop/my_works/project/CMakeLists.txt"

  :include-path '("/interface")

  :system-include-path '("/usr/include")

  :spp-table '(("BOOST_TEST_DYN_LINK" . ""))

  :local-variables (list

    (cons 'compile-command "make --directory=\"~/Develop/my_works/project/build\"")))