No backoffice with fresh install, frontoffice works

[funklab]

Hello,

Just did a fresh Prestashop install. The front works fine but i can not login in the backoffice.
I did all the usual things and changed the name of the admin folder. (admintm)

This is what happens:
The login screen appears with this url:
http://funklab.nl/admintm/login.php?redirect=index.php

The the login screen appears again (without any sign of a problem), with this url:
http://funklab.nl/admintm/login.php?redirect=p

When i give in my username and password again i get this:
------------
The requested URL /funklab/admintm/p was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
------------

With this url:
http://funklab.nl/admintm/p

This "redirect=p" would be the problem?

Anyone an idea what's going wrong?

Database is fine, right chmods are set, there's no directory set during install, it's in the root.

Thanks