What happens when you try to use your account? Do you get a "logging into [site] has failed" balloon pop-up?
If that's the case, this is commonly caused by the captcha they sometimes show when you attempt to login. HDoujin doesn't currently have a way of dealing with this particular captcha just yet, so the login fails.
Fortunately, there's a way around it-- Try following the instructions here:
https://doujindownloader.com/faq-i-cant ... entai-org/
That should do it, but if not, let me know!