squirrelmail login problems

Hi,

I configured a mail server and I'm trying to configure webmail also but i get some errors when i login to the site.

mail.log
 
Feb 28 03:26:56 mail imapd: Connection, ip=[::1]
Feb 28 03:27:33 mail imapd: Connection, ip=[::ffff:127.0.0.1]
Feb 28 03:27:33 mail imapd: LOGIN FAILED, user=jeroen@local.nl, ip=[::ffff:127.0.0.1]
Feb 28 03:27:38 mail imapd: LOGOUT, ip=[::ffff:127.0.0.1], rcvd=52, sent=323
Feb 28 03:27:45 mail imapd: Connection, ip=[::ffff:127.0.0.1]
Feb 28 03:27:45 mail imapd: chdir Maildir: No such file or directory
Feb 28 03:27:45 mail imapd: jeroen: No such file or directory
Feb 28 03:32:55 mail imapd: Connection, ip=[::ffff:127.0.0.1]
Feb 28 03:32:55 mail imapd: chdir Maildir: No such file or directory
Feb 28 03:32:55 mail imapd: jeroen: No such file or directory

The right dirs are also created.

root@mail:/var/mail/virtual# pwd
/var/mail/virtual
root@mail:/var/mail/virtual# ls -ltra
total 20
drwxrwsr-x 3 root    mail    4096 2010-02-27 14:43 ..
drwx--S--- 5 virtual virtual 4096 2010-02-27 15:47 test
drwx--S--- 5 virtual virtual 4096 2010-02-27 15:49 jeroen
drwxr-sr-x 5 virtual virtual 4096 2010-02-28 03:19 .
drwx--S--- 5 virtual virtual 4096 2010-02-28 03:19 joyce
root@mail:/var/mail/virtual/jeroen# pwd
/var/mail/virtual/jeroen
root@mail:/var/mail/virtual/jeroen# ls -ltra
total 20
drwx--S--- 2 virtual virtual 4096 2010-02-27 15:49 cur
drwx--S--- 5 virtual virtual 4096 2010-02-27 15:49 .
drwx--S--- 2 virtual virtual 4096 2010-02-28 03:10 tmp
drwx--S--- 2 virtual virtual 4096 2010-02-28 03:10 new
drwxr-sr-x 5 virtual virtual 4096 2010-02-28 03:19 ..
root@mail:/var/mail/virtual/jeroen/new# pwd
/var/mail/virtual/jeroen/new
root@mail:/var/mail/virtual/jeroen/new# ls -ltra
total 20
-rw------- 1 virtual virtual  425 2010-02-27 15:49 1267282160.Vfc00I548fM177362.mail
drwx--S--- 5 virtual virtual 4096 2010-02-27 15:49 ..
-rw------- 1 virtual virtual 3298 2010-02-27 15:51 1267282314.Vfc00I54a0M170046.mail
-rw------- 1 virtual virtual 3831 2010-02-28 03:10 1267323030.Vfc00I54b2M855278.mail
drwx--S--- 2 virtual virtual 4096 2010-02-28 03:10 .

Does anyone know what is configured wrong?