Can't login to roundmail

Hi,

I am new to this roundmail and to this list so bear with me. I am running a Linux server with Apache 2.0.54 and mod_php 4.4.0-r3 on Gentoo. After installing roundcube (v0.1-20051007) and giving read+write permissions to the directories logs and temp to the respective Apache owner, nothing happens when a user logs in i.e. a timeout occurs. The only thing I can see is the following reference in the error log of roundcube:

[10-Okt-2005 16:39:55] PHP Warning: Invalid argument supplied for foreach() in /var/www/service/htdocs/horde/program/include/rcube_imap.inc on line 301

Any ideas?

All the best & cheers, Sebastian