User variables same in 3.0.1??? – AddonChat Plugin

http://ww.wp.xz.cn/extend/plugins/wp-addonchat/

This plugin works in recent previous versions, but not in 3+…

It receives the error “invalid username or password” when trying to login.

I believe its the variables that are different in latest wordpress version?:

<?php

// Include the WordPress bootstrap
include_once(dirname( __FILE__ ) . '/../../../wp-config.php');

$using_ras = ( get_option( 'addonchat_use_ras' ) == 'yes' );

// Start printing
print "scras.version = 2.0\n";

if( $using_ras ) {

	// Decode the username and password
	$username = urldecode( $_GET[ 'username' ] );
	$password = urldecode( $_GET[ 'password' ] );

	// See if it is possible for these credentials to login
	$login = wp_login( $username, $password );
	$user = get_userdatabylogin( $username );
	if( $login ) { // The credentials are valid

		if( $user->user_level >= 8 ) { // User is an administrator
			print "user.usergroup.id = 2\n";
			print "user.usergroup.can_login = 1\n";
			print "user.usergroup.is_admin = 1\n";
			print "user.usergroup.mark_as_guest = 0\n";
			print "user.usergroup.post_delay = 0\n";
			print "user.usergroup.allow_pm = 1\n";
			print "user.usergroup.allow_room_create = 1\n";
			print "user.usergroup.idle_kick = 0\n";
			print "user.usergroup.can_kick = 1\n";
			print "user.usergroup.can_grant = 1\n";
			print "user.usergroup.can_cloack = 1\n";
			print "user.usergroup.can_see_cloak = 1\n";
			print "user.usergroup.can_ban = 1\n";
			print "user.usergroup.can_enable_moderation = 1\n";
			print "user.usergroup.can_system_speak = 1\n";
			print "user.usergroup.can_silence = 1\n";
			print "user.usergroup.allow_bbcode = 1\n";
			print "user.usergroup.max_msg_length = 2048\n";
			print "user.usergroup.filter_shout = 1\n";
			print "user.usergroup.filter_word_replace = 0\n";
			print "user.usergroup.can_launch_websites = 1\n";
			print "user.uid = {$user->ID}\n"; 

		} else { // non-admin but credentials are valid
			print "user.usergroup.id = 1\n";
			print "user.usergroup.can_login = 1\n";
			print "user.usergroup.is_admin = 0\n";
			print "user.usergroup.mark_as_guest = 0\n";
			print "user.uid = {$user->ID}\n"; 

		}

	} else if( !$login && !$user && get_option( 'addonchat_enable_guest' ) == 'yes' ) {
		// Login guest users if their username is not in the system (prevents the wrong
		// password with valid username bug)
		print "user.usergroup.id = 3\n";
		print "user.usergroup.can_login = 1\n";
		print "user.usergroup.mark_as_guest = 1\n";

	} else {
		print_cannot_login();

	}

} else {
	print_cannot_login();

}

/**
 * Utility function to print data when credentials are not valid.
 *
 */
function print_cannot_login() {
	print "user.usergroup.id = 1000\n";
	print "user.uid = -1\n";
	print "user.usergroup.can_login = 0\n";
}

?>

I think its related to this section in particular:

// Decode the username and password
	$username = urldecode( $_GET[ 'username' ] );
	$password = urldecode( $_GET[ 'password' ] );

	// See if it is possible for these credentials to login
	$login = wp_login( $username, $password );
	$user = get_userdatabylogin( $username );
	if( $login ) { // The credentials are valid

Please advise!