Joomla error after user change

I changed the user of a domain that has a old joomla 1.0 site on it.

I changed the configuation.php file to the new user and the site loaded ok.

But none of the sites internal links work now.
It comes up with an error:

"Not Found

The requested URL /component/option,com_frontpage/Itemid,1/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

Any idea how to fix this?

Check the .htaccess file in your joomla root. Make sure it is there and accurate. Try turning off the SEO option and see if your internal links start working again. Your error is missing the domain.

It was the SEO option, have turned it off, all working now. THANKS