/*
 * Author:        Pierre-Henry Soria <ph7software@gmail.com>
 * Copyright:     (c) 2012-2016, Pierre-Henry Soria. All Rights Reserved.
 * License:       GNU General Public License; See PH7.LICENSE.txt and PH7.COPYRIGHT.txt in the root directory.
 */

#make_money {
    background: url(../img/make-money.jpg);
    margin: 20px;
    width: 300px;
    height: 291px;
    margin: 2px 2px 2px 2px;border:1px solid #999;
    border-radius: 5px;
}
.aff_login {
    margin-top: 20px;
}

/*
 * Author:        Pierre-Henry Soria <ph7software@gmail.com>
 * Copyright:     (c) 2012-2016, Pierre-Henry Soria. All Rights Reserved.
 * License:       GNU General Public License; See PH7.LICENSE.txt and PH7.COPYRIGHT.txt in the root directory.
 */

#make_money {
    background: url(../img/make-money.jpg) no-repeat;
    margin: 20px;
    width: 300px;
    height: 291px;
    margin: 2px 2px 2px 2px;border:1px solid #999;
    border-radius: 5px;
}
.aff_login {
    margin-top: 20px;
}

Add no-repeat to background affiliate img
Add no-repeat to background affiliate img
