[TYPO3] Error login to typo3

[Edward Woo]

Hi All,
 
I have problem login to my typo3. This is my first time login.
 
The error message is:
 
Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL
result resource in /var/www/typo3_src-4.0/t3lib/class.t3lib_db.php on
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL
result resource in /var/www/typo3_src-4.0/t3lib/class.t3lib_db.php on
line 801

Please help...thanks for any reply