make sure the $WAGLOBAL_Root_URL in the WA_Globals file is set correctly.
the $WAGLOBAL_Root_URL should go to the root of the directory you have uploaded the user registration solution pack.
If the user registration solution pack file are uploaded to:
userReg
the root url needs to be set to:
$WAGLOBAL_Root_URL = "http://www.yourdomain.com/userReg/" ;