[Typo3] Warning: mysql_fetch_row()

[K-net]

Hi,

This is the first time i try to get help this way...
My problem is that when i log in my typo3 backend i get this 
warning-message:

/Warning: mysql_fetch_row(): supplied argument is not a valid MySQL 
result resource in /var/www/html/typo3/t3lib/class.t3lib_db.php on line 736

Warning: Cannot modify header information - headers already sent by 
(output started at /var/www/html/typo3/t3lib/class.t3lib_db.php:736) in 
/var/www/html/typo3/template.php on line 601/


Hope to get help this way


K-net