Form does not submit GET or POST requests.

There is a form that should pass data to a php handler that will send it to the database.
At first I tried to send a POST request. But constantly the handler page gave a 500th error. Then I tried GET, the page opened, but there were no variables in the address bar.

<form id="form_298029" class="appnitro" method="get" action="newprofile.php">
  <div class="form_description">
    <h2>  </h2>
    <p></p>
  </div>
  <ul>
    <li id="li_1">
      <label class="description" for="element_1"></label>
      <div>
        <input id="element_1" name="name" class="element text medium" type="text" maxlength="255"
        value="" />
      </div>
      <p class="guidelines" id="guide_1">
        <small> </small>
      </p>
    </li>
    <li id="li_2">
      <label class="description" for="element_2"></label>
      <div>
        <input id="element_2" name="surname" class="element text medium" type="text"
        maxlength="255" value="" />
      </div>
      <p class="guidelines" id="guide_2">
        <small> </small>
      </p>
    </li>
    <li id="li_3">
      <label class="description" for="element_3"></label>
      <div>
        <input id="element_3" name="middle" class="element text medium" type="text" maxlength="255"
        value="" />
      </div>
      <p class="guidelines" id="guide_3">
        <small> </small>
      </p>
    </li>
    <li id="li_6">
      <label class="description" for="element_6"></label>
      <div>
        <select class="element select medium" id="element_6" name="klass">
          <option value="1">8</option>
          <option value="2">9</option>
          <option value="3">10</option>
          <option value="4" selected="selected">11</option>
        </select>
      </div>
      <p class="guidelines" id="guide_6">
        <small> </small>
      </p>
    </li>
    <li id="li_7">
      <label class="description" for="element_7"></label>
      <div>
        <select class="element select medium" id="element_7" name="gender">
          <option value="1" selected="selected"></option>
          <option value="2"></option>
        </select>
      </div>
      <p class="guidelines" id="guide_7">
        <small> </small>
      </p>
    </li>
    <li id="li_4">
      <label class="description" for="element_4">Email</label>
      <div>
        <input id="element_4" name="email" class="element text medium" type="text" maxlength="255"
        value="" />
      </div>
      <p class="guidelines" id="guide_4">
        <small> email</small>
      </p>
    </li>
    <li id="li_8">
      <label class="description" for="element_8"> </label>
      <div>
        <input id="element_8" name="phone" class="element text medium" type="text" maxlength="255"
        value="" />
      </div>
      <p class="guidelines" id="guide_8">
        <small>    : 89030123456</small>
      </p>
    </li>
    <li class="buttons">
      <input type="hidden" name="form_id" value="298029" />
      <input id="saveForm" class="button_text" type="submit" name="submit"
      value="   " />
    </li>
  </ul>
</form>

Answer 1, authority 100%