Home.php, nav-previous doesn't show the old posts

My current setup WP
– WordPress version : 3.01
– Version of PHP / MySQL : 5
– Theme used : ThemeMeme Aperio Prototype
– Extensions in place :
– Name of hoster : OVH
– Site Address : http://www.marie-a-tout-prix.be/

Hello everyone,

I have a problem on my home.php page, it displays the last 7 posts in the bottom. i have nav-previous nav-next for post at the bottom

the problem is .nav-previous “Previous” points to http://www.marie-a-tout-prix.be/page/2/ and I see the same posts as on the first page and not the 8-15 old posts.

how to make the ..page/2/ shows good posts please?

[Code moderated as per the Forum Rules. Please use the pastebin]

Thank you in advance

Nix