http://localhost doesn't work

Hi everyone SuSE 7.3 with Apache and PHP4 When I type e.g. http://localhost/index.html.en, the browser asks me if I want to save or open the file. If I choose open it gives me a listing of the file rather than displaying it. Konqueror gives: 'could not create view for application/x-html. The diagnostics is:' and then a blank. Can anyone help me with this? Thanks, Steve.