Please make sure the "Turn WordPress to wpForo " option is disabled in Forums > Settings > General admin page. If you want to have WP posts and pages you should not use this. To set wpForo on home page you should use this method:

https://wpforo.com/community/faq/how-to-load-forum-on-home-page/

First I enabled the option of  "turn wordpree to wpforo" , but every wordpress page was showing forum only...so I disabled this option but still wordpress pages are not working

That's browser cache (browsers cache redirection and that's very hard to see current status, even if the redirection doesn't exist), please check it on other PC's or browsers. Don't forget delete all caches.