请路过的好心大佬帮我检查一下作业，看我错哪了

重做了燃烧瓶配方，因为觉得做燃烧瓶用机油太奢侈了，所以改成汽油碎布和碎玻璃，契合初期使用；后来把机器人炮台霰弹的配方也想改了，觉得浪费鹿弹材料，改成石头了，现在的情况是燃烧瓶配方改成功了，机器人炮台霰弹不成功，没有任何效果，配方没变化，我贴出来，请路过的大佬帮我看看我错哪里了？

    <?xml version=”1.0″ encoding=”UTF-8″?>

<configs>

    <remove xpath=”/recipes/recipe[@name='thrownAmmoMolotovCocktail']”/>

    <remove xpath=”/recipes/recipe[@name='ammoJunkTurretShell']”/>

    <remove xpath=”/recipes/recipe[@name='ammoBundleJunkTurretShell']”/>

    <append xpath=”/recipes”>

        <recipe name=”thrownAmmoMolotovCocktail” count=”1″ craft_time=”12″ tags=”packMuleCrafting”>

            <ingredient name=”ammoGasCan” count=”30″/>

            <ingredient name=”resourceCloth” count=”5″/>

            <ingredient name=”resourceBrokenGlass” count=”3″/>

        </recipe>

        <recipe name=”ammoJunkTurretShell” count=”1″ craft_time=”.36″ tags=”learnable”>

            <ingredient name=”resourceScrapLead” count=”1″/>

            <ingredient name=”resourceRockSmall” count=”10″/>      原版代码只改了这里将鹿弹替换为10个石头

        </recipe>

        <recipe name=”ammoBundleJunkTurretShell” count=”1″ craft_time=”360″ craft_area=”workbench” tags=”learnable,workbenchCrafting”>

            <ingredient name=”resourceScrapLead” count=”800″/>

            <ingredient name=”resourceRockSmall” count=”8000″/>      还有这里一样改成石头

        </recipe>

    </append>

</configs>