Cyrillic characters displays as question marks.

I'm loading a string from database and displaying it as 3D Text. Sadly, cyrillic symbols are displayed as question marks.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 public class DataLoader : MonoBehaviour
 {
     public string[] items;
     public Shader shader1;
     IEnumerator Start()
     {
         WWW DBData = new WWW("http://localhost/virtual_museum/DB.php");
         yield return DBData;
         string DBDataString = DBData.text;
         print(DBDataString);
         items = DBDataString.Split('&');
         print(GetDataValue(items[0], "Info:"));
                   GameObject OB = new GameObject();  
                   OB.name = "Sign";  
                   OB.AddComponent<MeshRenderer>(); 
                   OB.AddComponent<TextMesh>();
                   OB.GetComponent<TextMesh>().text = (GetDataValue(items[0], "Info:"));
                   OB.GetComponent<TextMesh>().fontSize = 50;
                   OB.transform.localScale -= new Vector3(0.9f, 0.9f, 0.9f);
                   OB.transform.position = new Vector3(-703.73f, 1864.6f, 4634.93f);
                   OB.GetComponent<TextMesh>().alignment = TextAlignment.Center;
                   OB.GetComponent<TextMesh>().anchor = TextAnchor.MiddleCenter;
                   shader1 = Shader.Find("Font_Shader");
                   OB.GetComponent<Renderer>().material.shader = shader1; 
     }
     string GetDataValue(string data, string index)
     {
         string value = data.Substring(data.IndexOf(index) + index.Length);
         if (value.Contains("|")) value = value.Remove(value.IndexOf("|"));
         return value;
     }
 }

If I replace GetDataValue(items[0], "Info:") with regular string it works just fine. What could be the problem? ,