I installed a mysql cartridge but I get state unknown on all requests to /gear_groups

    {
      "gears": [
        {
          "id": "05795073f4f2426e9e8aea1d858f05fa",
          "state": "unknown"
        }
      ],
      "cartridges": [
        {
          "name": "mysql-5.1"
        }
      ],
      "name": "@@app/comp-proxy/cart-mysql-5.1/group-mysql"
    }