Redirecting doesn't rank on google

[Morten_Hjort]

We are redirecting our artist's official website to copenhagenbeta.dk. We have two artists (Nik & Jay and Burhan G)  that top ranks on Google (first on page 1), but one of them (Lukas Graham) doesn't rank at all. We use the same procedure with all artists.

http://copenhagenbeta.dk/index.php?option=com_artistdetail&task=biography&type=overview&id=49

Doesn't rank but the old artist page still does. Is it the old page that tricks Google to think that this is the active page for the artist?

[YannickVeys]

Are you redirecting with a 301 redirect? What is the url of the page you are redirecting from?

[Morten_Hjort]

Yeah I use a 301 redirect. The url is Lukasgraham.dk