Website unable to find secondary pages – hosted on outside server

I’m once again having trouble with my wordpress website. I have installed a theme and framework, got the homepage styled and working as it should be. I am now ready to move onto the secondary pages, which were already placed with the theme, however my website cannot find them when they are previewed and selected on the live website.

Is it something I need to add manually into my ftp or is it a problem with wordpress itself?

Thanks in advance!