Code-generated ui text disappear when installed on android device

Using Unity 5.0.0p2 x64

I have some UI text boxes containing some text from a XML file, The problem is that only when Iam running the APK on my android phone, suddenly the text is gone. I can see it when Iam on play mode and even when Iam emulating the project with Unity Remote, also when I build the project to Windows everything is fine, but when Iam runing it on my phone it doesnt work!!

here's my code for reading the XML files :

     public string ReadXmlFile (string fileName, string data)
     {
         
         string path = Application.dataPath + @"\XML\";
 
         if (File.Exists (path + fileName + "Data.xml")) {
             XmlTextReader xmlReader = new XmlTextReader (path + fileName + "Data.xml");
             if (data == "Target") {
                 while (xmlReader.Read ()) {
                     if (xmlReader.Name == "Target")
                         return " " + xmlReader.ReadString ();
                 }
             }
 
             if (data == "Data") {
                 while (xmlReader.Read ()) {
                     if (xmlReader.Name == "Data")
                         return " " + xmlReader.ReadString ();
                 }
             }
 
         }
         return data;
     }

Cant find any solution on google.. I HAVE TO WORK IT OUT SOMEHOW PLEASE HELP!!!