Everytime I want to preview the page, it remains unchanged...Why? What happened?

Everytime I want to preview the page, it remains unchanged…Why? What happened?

I don’t know if there is a big delay for its updating? But I can see it still remains unchanged after I wait for 2 hour…

Why happen this? I need preview to see the website present effect! Please help!!

are you using any cache plugin?
if yes then you have to clear cache from the cache plugin.

Otherwise how to contact an author to get support or for any technical query:

I am not using any cache plugin. So I don’t know what’s the problem. I already emailed the author. Thanks!