[TYPO3] sr_feuser_register - warnings

[Ryan]

Getting these warnings when using sr_feuser_register...
How to fix this ?

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

Warning: Cannot modify header information - headers already sent by (output 
started at /home/rtx/t3lib/class.t3lib_db.php:801) in 
/home/rtx/typo3/sysext/cms/tslib/class.tslib_fe.php on line 2767