my %smblCO = (
      'xE2' => {
        '\xE2\x80\x9A' => '‚',
        '\xE2\x80\x9C' => '“',
        '\xE2\x80\x9D' => '”',
        '\xE2\x80\x9E' => '„',
        '\xE2\x80\x93' => '–',
        '\xE2\x80\x94' => '—',
        '\xE2\x80\x98' => '‘',
        '\xE2\x80\x99' => '’',
        '\xE2\x80\xA0' => '†',
        '\xE2\x80\xA6' => '…',
        '\xE2\x84\xA2' => '™'
      }, 
      'xC2' => {
        '\xC2\xA9' => '©',
        '\xC2\xAE' => '®',
        '\xC2\xB1' => '±',
        '\xC2\xBC' => '¼',
        '\xC2\xBD' => '½',
        '\xC2\xBE' => '¾',
        '\xC2\xB0' => '°'
      }
    );
[download]

You should try putting the keys in double quotes.

    my %smblCO = (
      'xE2' => {
        "\xE2\x80\x9A" => '‚',
        "\xE2\x80\x9C" => '“',
        "\xE2\x80\x9D" => '”',
        "\xE2\x80\x9E" => '„',
        "\xE2\x80\x93" => '–',
        "\xE2\x80\x94" => '—',
        "\xE2\x80\x98" => '‘',
        "\xE2\x80\x99" => '’',
        "\xE2\x80\xA0" => '†',
        "\xE2\x80\xA6" => '…',
        "\xE2\x84\xA2" => '™'
      }, 
      'xC2' => {
        "\xC2\xA9" => '©',
        "\xC2\xAE" => '®',
        "\xC2\xB1" => '±',
        "\xC2\xBC" => '¼',
        "\xC2\xBD" => '½',
        "\xC2\xBE" => '¾',
        "\xC2\xB0" => '°'
      }
    );
[download]