[Typo3] dkd_feuser_belogin: No cookies, no Typo3

[Bastiaan Rodenburg]

Hi all,

I've a strange problem with extension  dkd_feuser_belogin (FEUser->BELogin). 
Loading works fine. But when I log out from BE and log in again my 
production server says something like "No cookies, no Typo3". But on my 
development server, everything works ok. And of course I'm sure that cookies 
ARE enabled!

The message comes from the class "class.ux_SC_index.php" of this extension.

I'm using Typo3 3.8.0 on PHP5.0.4.

Please help, this extension is critical for my site!

Bastiaan Rodenburg.