How to remove buff fire on

[batboyboy]

    <append xpath="/buffs/buff[@name='buffIsOnFire' or @name='buffBurningElement']">
        <effect_group name="clearafterdeath">
            <triggered_effect trigger="onSelfRespawn" action="RemoveBuff" buff="buffIsOnFire"/>
        </effect_group>
    </append>
    <append xpath="/buffs/buff[@name='buffBurningElement']">
        <effect_group name="clearafterdeath">
            <triggered_effect trigger="onSelfRespawn" action="RemoveBuff" buff="buffBurningElement"/>
        </effect_group>
    </append>

I have a piece of code that removes the burning on death, but they don't work! so is there any way to add a mod that can remove the burn effect completely?