Contact page didn't include a form; so I just deleted the page and created a new one with the same content including a contact form. I wrote the same SEO name in the Add-ons tab. But it doesn't work as it worked before I deleted the old page.
If I manually type the SEO URL to the browser; it works fine. But the links included in CS Cart prints out something like; /index.php?dispatch=pages.view&page_id=20 and clicking on it produces a 404 error.