Email all members error

[mrselnombre]

YaBB SE Version: 1.5.4
PHP Version:
MySQL Version:
Server Platform:
Link to Forum: http://www.totaltwaddle.co.uk/board

Problem Description:
just went into the admin section to have a look at the email all members feature and this was there.......

You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 't shut me up'' at line 1
File: /home/mrselnom/public_html/board/Sources/Admin.php
Line: 746


any ideas?

[[Unknown]]

Don't use 's in your membergroup or post group names.

-[Unknown]