Vào Display >> Templates >> Overall_header
Tìm

Code:

<form action="{S_LOGIN_ACTION}" method="get">

hoặc bên dưới

Code:

<!-- BEGIN switch_user_logged_out -->

tim

Code:

<form action="{S_LOGIN_ACTION}" method="post" name="form_login">

Thay bằng

Code:

<form action="{S_LOGIN_ACTION}?redirect={TOPIC_URL}" method="post" name="form_login">