Thank you sir, I was actually trying to instruct my users to sign up to the site by inputting some text in wpforo plugin editor.The text is "Joi...

You can disable wpForo Login and registration page and use other plugins to create your own registration/login pages. To disable wpForo registration...

Thank you very much, it's now working fine. But I still need two more help please. 1. How can I customise registration and login page in my ow...