when i re-arrange the forums and sub forums and save them but its not saved what is the reason kindly tell me the solution.
1. You should click the blue button at the bottom.
2. Maybe you have lots of forums and sub-forums which passes the limit of your hosting resources. Here is the answer: https://wpforo.com/community/how-to-and-troubleshooting-2/save-forums-order-and-hierarchy-problem/#post-11412
3. This could be a cache issue. Delete all caches in Dashboard > Forums > Dashboard admin page. If you have a cache plugin, exclude the forum page from your cache plugin. Here is the instruction: https://wpforo.com/community/faq/wpforo-and-cache-plugins/