Problem installing SAMS, what is the reason?

Question

Squid

Debian 7 server amd64
I install all necessary packages:
#apt-get install apache2 php5 phpmyadmin mysql squid I
download and install SAMS
In /etc/sams.conf I correct MYSQLUSER and MYSQLPASSWORD values ​​to my own.
Next, I create and import mysql database under Sams.
#mysql -u root -p squidctrl < sams_db.sql
#mysql -u root -p squidlog < squid_db.sql
Setting up Apache2.
#nano /etc/php5/apache2/php.ini Enable
safe mod
safe_mode = On
safe_mode_exec_dir = "/usr/share/sams/bin"
by the same type I prescribe and
mysql.safe_mode_exec_dir = "/usr/share/sams/bin". The bundle specified in the instruction does not give any effect)
Next, I install the web interface:
sams-web and sams-doc
I create a link to the Sams directory.
#ln -s /usr/share/sams /var/www/sams
I edit the GetHostName function in the Sams web form sources.
When updating the php engine, the function of the same name was used so that I replace GetHostName with GetName.
Files where this replacement was made:
#nano /usr/share/sams/src/configtray.php #nano
/usr/share/sams/src/webconfigtray.php
“The requested URL /sams/data/xxxxxxxxxxxxxx.sql.gz was not found on this server”
saving the configuration in it or an error in import / export of black / white lists, I change the owner to the /usr/share/sams directory.
and access rights to /usr/share/sams/data
#chown www-data:www-data /usr/share/sams
#chmod 775 -R /usr/share/sams/data
I go to the web interface, it works fine. As soon as I restart the server, the web interface becomes unavailable and claims that Access is denied for user [email protected] to MySQL, although the rights are registered in the database.