Portfolio pictures don’t link

I have a problem. I have created 8 different portfolios and I’ve managed to have them on the start page. But the Pics from the start page don’t link to the portfolio, which means that I don't access the portfolio with pictures. And that means that the portfolios are meaningless. When clicking the pics which should link to the portfolios, I just keep getting this message: “Nothing Found Oops! That page can’t be found” What should I do? How do I get the link to the portfolios to work? My website is timolainen.nu. Best regard, Timo Lainen