Dear Changxiushanwi,
Just try debugging without the BDM connected.
You should get an error dialogue with three options. One of these options being to "Change Settings".
This will open the missing dialogue.
Sorry - this is not obvious but I have no other way of doing this in the legay Codewarrior due to how low a level the dialogue operates at.
PS. You could also delete the settings file to restore the defaults %APPDATA%/usbdm/usbdm_HC12.cfg.
bye