Hi Axxy,
we moved the site to a new server with a clean install of the latest version of the forum software. Authentication is still managed by the forum and you only need to authenticate once.
If you still experience this issue please let us know, but first delete all cookies for amp.dascene.net.
EDIT:
just realized it happens if you go back to the non https version of the site.
Once authenticated, just click on the "Return to Amiga Music Preservation" link at the top right-hand corner of the page in the forum and everything should be fine.
.\\onty