[Serusers] Login error on /serweb/admin/index.php !!

Hi, As a beginning user of Serweb, I got the following errors when I trying to login with administrator privileges at /serweb/admin/index.php. Debug: query = select val from active_sessions where sid = 'f44e3059f761a564b72ff6f5620a432b' and name = 'phplib_Session' Warning: Cannot add header information - headers already sent by (output started at /var/www/phplib/db_mysql.inc:114) in /var/www/html/serweb/admin/index.php on line 37 Debug: query = update active_sessions set val='cGhwbGliX1Nlc3Npb246JHRoaXMtPmluID0gJzAnOyAkdGhpcy0+cHQgPSBhcnJheSgpOyA kdGhpcy0+cHRbJ3Nlc3NfZnVzZXJzJ10gPSAnMSc7ICR0aGlzLT5wdFsnc2Vzc19hZG1pbiddID0 gJzEnOyAkdGhpcy0+cHRbJ3ByZV91aWQnXSA9ICcxJzsgJEdMT0JBTFNbJ3Nlc3NfZnVzZXJzJ10 gPSBuZXcgQ2Z1c2VyczsgJEdMT0JBTFNbJ3Nlc3NfZnVzZXJzJ10tPnVzcm5tID0gJyc7ICRHTE9 CQUxTWydzZXNzX2Z1c2VycyddLT5mbmFtZSA9ICcnOyAkR0xPQkFMU1snc2Vzc19mdXNlcnMnXS0 +bG5hbWUgPSAnJzsgJEdMT0JBTFNbJ3Nlc3NfZnVzZXJzJ10tPmVtYWlsID0gJyc7ICRHTE9CQUx TWydzZXNzX2Z1c2VycyddLT5vbmxpbmVvbmx5ID0gJyc7ICRHTE9CQUxTWydzZXNzX2Z1c2Vycyd dLT5hY3Rfcm93ID0gJzAnOyAkR0xPQkFMU1snc2Vzc19hZG1pbiddID0gJzEnOyAkR0xPQkFMU1s ncHJlX3VpZCddID0gJzY1ZTM5N2NkYTBhYThlMzIwMmVhMjJjYmQzNTBlNGU5Jzsg', changed='20041229095426' where sid='f44e3059f761a564b72ff6f5620a432b' and name='phplib_Session' Can any experts tell me what is going on? I tried to solve it for half a month and with no result at all, please help and thx a lot. Attached pls find the related config file. Thx!! Gary