config.xml

<events>
            <customer_register_success>
                <observers>
                    <magemlm_observer>
                        <class>magemlm/observer</class>
                        <method>registerCustomer</method>
                    </magemlm_observer>
                </observers>
            </customer_register_success>

            <controller_front_init_before>
                <observers>
                    <magemlm_observer>
                        <class>magemlm/observer</class>
                        <method>getLink</method>
                    </magemlm_observer>
                </observers>
            </controller_front_init_before>

            <adminhtml_customer_save_after>
                <observers>
                    <magemlm_observer_save_customer>
                        <type>singleton</type>
                        <class>Qsolutions_Magemlm_Model_Observer</class>
                        <method>saveCustomerMlmData</method>
                    </magemlm_observer_save_customer>
                </observers>
            </adminhtml_customer_save_after>

            <checkout_onepage_controller_success_action>
                <observers>
                    <magemlm_observer_compensation_plan>
                        <type>singleton</type>
                        <class>Qsolutions_Magemlm_Model_Observer</class>
                        <method>saveCompensation</method>
                    </magemlm_observer_compensation_plan>
                </observers>
            </checkout_onepage_controller_success_action>

        </events>