Link to first post/page

Hello everyone

I manage a blog for two of my friends, and it’s configured to show one post on every page. We have links to ‘first post’, ‘previous post’, ‘next post’ and ‘newest post’ at the bottom, but I can’t get the link to the first post working.
I want it to link to this page: “http://visniffertandpasta.dk/page/155” instead of this: “http://visniffertandpasta.dk/2009/01/02/skumfiduser” (the permalink)
But the problem is that the “/page/155” changes every time we post something new.
How can I do it? Can I do it?

I’ve tried searching for it, but I can’t find anything – I think I’m using the wrong search words, but I don’t know what else to try..

I really hope one of you can help me, because this problem has been annoying me for months!
– Christina