[Koha] Internal Server Error

[constantine]

Hello to all!...

I have successfully installed  koha-2.2.9.

I can add Members/Organizations and search for them flawlessly,
BUT, trying to add a bibliographic records leads me to this error:

Internal Server Error
The server encountered an internal error or misconfiguration and was
unable to complete your request.
Please contact the server administrator, w at w.c and inform them of the
time the error occurred, and anything you might have done that may
have caused the error.
More information about this error may be available in the server error log.
Apache/2.2.9 (Debian) PHP/5.2.6-1 with Suhosin-Patch Server at
localhost Port 8889

MySQL server IS running:
# ps aux |grep mysql
root     10115  0.0  0.0   1820   516 pts/4    S    00:54   0:00
/bin/sh /usr/bin/mysqld_safe
mysql    10163  0.0  1.4 128736 18144 pts/4    Sl   00:54   0:07
/usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql
--pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking
--port=3306 --socket=/var/run/mysqld/mysqld.sock
root     10165  0.0  0.0   4704   616 pts/4    S    00:54   0:00
logger -p daemon.err -t mysqld_safe -i -t mysqld

and also I get
# a2enmod auth_mysql
Module auth_mysql already enabled
# /etc/init.d/apache2 restart

What should I do?


Thank you in advance,

Constantine Tsardounis
http://costis.name