Dragon Naturally Speaking COM returned error code

Hey everyone,
Recently I have find out about Dragon Naturally Speaking software. I have installed new Mozilla Firefox. I don't know what went wrong but when I dictate in Firefox I got error message. Is anyone having this kind of problem? I got panic because I don't try this for the first time. On my computer I am using Windows XP.
If anyone have solution for this please help.
Thanks
Mark
Dragon NaturallySpeaking
COM returned an unexpected error code: Details are
HOOKERR_NONOTIFYWINDOW
