[TYPO3] Urgent help needed

[rocky]

Hey list,

I do not know why one of my live website designed by typo3 version 4.0.1 
give me the following warning:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php on 
line 801

Warning: Cannot modify header information - headers already sent by 
(output started at 
/home/maxsour/public_html/typo3_src-4.0.1/t3lib/class.t3lib_db.php:801) 
in 
/home/maxsour/public_html/typo3_src-4.0.1/typo3/sysext/cms/tslib/class.tslib_fe.php 
on line 2826

Can any of you give me a hint please!

Rocky