WWWForms and sending data to database dont work

Hello,following code dont work to talk to the database! Just nothing happens! When i click on the Button the StartCoroutine will be executed but the script dont talk to the database! Anyone any ideas? Thank you!

 using UnityEngine;
 using System.Collections;
 using UnityEngine.SceneManagement;
 using UnityEngine.UI;
 
 public class CreateAccountManager : MonoBehaviour {
     
     //Static Variables
 
     //Variablen für LoginFormular
     public static string accountEmail = "";
     public static string accountEmailConfirm = "";
     public static string accountPassword = "";
     public static string accountPasswordConfirm = "";
 
     //Public Variables
 
     //Private Variables
     private string createAccountUrl = "http://127.0.0.1/CreateAccount/Test1.php";
 
     //FormInputs
     [SerializeField]
     private InputField fldAccountUsername;
     [SerializeField]
     private InputField fldAccountUsernameConfirm;
     [SerializeField]
     private InputField fldAccountPassword;
     [SerializeField]
     private InputField fldAccountPasswordConfirm;
     [SerializeField]
     private Text txtErrorMessage;
 
     // Use this for initialization
     void Start () {
         fldAccountUsername.contentType = InputField.ContentType.EmailAddress;
         txtErrorMessage.text = "";
     }
     
     // Update is called once per frame
     void Update () {
         accountEmail = fldAccountUsername.text;
         accountEmailConfirm = fldAccountUsernameConfirm.text;
         accountPassword = fldAccountPassword.text;
         accountPasswordConfirm = fldAccountPasswordConfirm.text;
     }
 
     public void CreateAccountClicked ()
     {
         if( accountPasswordConfirm == accountPassword && accountEmailConfirm == accountEmail )
         {
             StartCoroutine ("CreateUserAccount");
         }
         else
         {
             txtErrorMessage.text = "Error: Input dont match!";
         }
     }
 
     IEnumerator CreateUserAccount()
     {
         WWWForm Form = new WWWForm ();
         Form.AddField ("UserEmail", accountEmail);
         print (accountEmail);
         Form.AddField ("UserPassword", accountPassword);
         WWW CreateAccountWWW = new WWW (createAccountUrl, Form);
 
         //Wait for PHP-File!
         yield return CreateAccountWWW;
 
         if (CreateAccountWWW.error != null)
         {
             Debug.LogError ("Cannot Connect to Create Account!");
             txtErrorMessage.text = "Error: Cannot Connect to Create Account!";
         }
         else
         {
             string CreateAccountReturn = CreateAccountWWW.text;
             if(CreateAccountReturn == "Success" )
             {
                 Debug.Log ("Success: Account Created!");
             }
         }
     }
 }

edit(moved from answer)

This is the PHP-File to talk to the database:

 <?php
   //Email and Password
 @$UserEmail = $_REQUEST["UserEmail"];
 @$UserPassword = $_REQUEST["UserPassword"];
 
 //PHP Only
     $servername = "localhost";
     $serverUserName = "root";
     $serverPassword = "";
     $dbName = "login";
 
 $conn = new mysqli($servername, $serverUserName, $serverPassword, $dbName);
 
 if(!$UserEmail || !$UserPassword){
     echo"Empty fields!";
 } else {
     $SQL = "SELECT * FROM accounts WHERE Email = '" . $UserEmail ."'";
     $Result = @mysqli_query($conn, $SQL) or die ("Database Error");
     $Total = mysqli_num_rows($Result);
     if($Total == 0){
         $insert = "INSERT INTO 'accounts' ('Email', 'Password') VALUES ('" . $UserEmail . "'. MD5('" . $UserPassword . "')";
         $SQL1 = mysql_query($insert);
         echo "Success";
     } else {
         echo "AlreadyUsed";
     }
 }
 
 
 //Close Mysq
 //mysql_close();
 ?>
 
 Can anyone help? Thx!