Menu dropdown - MATERIALIZE [Resolvido]

Boa noite pessoal estou com um problema em um menu que estou criando:

segue codigo

<nav class="blue-grey darken-4" role="navigation">
 <div class="nav-wrapper container">
 <a href="principal.php" class="brand-logo"><i class="material-icons">local_shipping</i>GR</a>
 <!-- Dropdown Structure -->
 <ul id="dropdown2" class="dropdown-content">
 <li><a href="edita-usuario.php?id=<?php echo $dados['usu_Id']; ?>">Meus dados</a></li>
 <li><a href="novo-usuario.php">Cadastrar</a></li>
 <li><a href="usuarios.php">Listar</a></li>
 <li><a href="empresa.php">Empresa</a></li>
 <li class="divider"></li>
 <li><a href="action/sair.php">Sair</a></li>
 </ul>
 <ul id="dropdown1" class="dropdown-content">
 <li><a href="#">Vendas</a></li>
 <li><a href="#">Estoque</a></li>
 <li><a href="#">Romaneios</a></li>
 </ul>

 <!-- MENU DESKTOP -->
 <ul class="right hide-on-med-and-down">
 <li><a href="#!">Fornecedores</a></li>
 <li><a href="#!">Clientes</a></li>
 <li><a href="#!">Transportadores</a></li>
 <!-- Dropdown Trigger -->
 <li><a href="#!" class="dropdown-button" data-target="dropdown1">Produtos<i class="material-icons right">arrow_drop_down</i></a></li>
 <li><a href="#!" class="dropdown-button" data-target="dropdown2">Settings<i class="material-icons right">arrow_drop_down</i></a></li>
 </ul>

 <!-- MENU MOBILE -->
 <ul id="nav-mobile" class="sidenav">
 <li><a href="#!">Fornecedores</a></li>
 <li><a href="#!">Clientes</a></li>
 <li><a href="#!">Transportadores</a></li>
 <!-- Dropdown Trigger -->
 <li><a href="#!" class="dropdown-button" data-target="dropdown1">Produtos<i class="material-icons right">arrow_drop_down</i></a></li>
 <li><a href="#!" class="dropdown-button" data-target="dropdown2">Settings<i class="material-icons right">arrow_drop_down</i></a></li>
 </ul>
 <a href="#" data-target="nav-mobile" class="sidenav-trigger"><i class="material-icons">menu</i></a>
 </div>
</nav>

	O menu Mobile funciona o Dropdown porem no desktop ja não funciona, alguém sabe o por que??