We have not tested our editor with the Korean version of MOSS 2007. However we will be happy to review the error that you get and see where the problem comes from. Please, translate the error message in English, as we do not have any Korean speakers in the office. Hopefully we will be able to get you going because we are not sure that we will be able to test this locally due to the localization restrictions. We will also appreciate it if you share the steps you have taken to add the editor into a webpart.