Greetings and welcome to the forums.
Sorry to hear you're having troubles. However, your post is so vague that I'm pretty certain it won't receive any useful responses.
Please take a moment to review the Forum Rules, conveniently linked at the top of every page in red, and inside you will find some guidance to composing a cogent problem summary that will be more likely to get responses.
I note from your profile that you're from Korea. If English is not your first language, please note that it's entirely fine to compose your message in your native language, run it through Google Translate, and then post the output here.
Good luck,
-J