B4J Question Error finding no records

Sub PlayButton_Action
    ExecuteRemoteQuery("SELECT * FROM xxxxxxx WHERE ID_PC  ='" & param1.text & "'",Listado)
End Sub

Sub ExecuteRemoteQuery(Query As String, JobName As String)
    Dim job As HttpJob
    job.Initialize(JobName, Me)
    job.PostString("http://www.xxxxx.com.ar/xxxx/xxxxx.php", Query)
End Sub

Sub JobDone(Job As HttpJob)
    If Job.Success Then
    Dim res As String 
    Dim tmpNum As String
    Dim tmp As String
     
        res = Job.GetString'("UTF8")
     
        Dim parser As JSONParser
        parser.Initialize(res)
     
        Select Job.JobName
            Case Listado
                Dim COUNTRIES As List
                COUNTRIES = parser.NextArray                         
             
                Dim m As Map
                m = COUNTRIES.Get(0)                         
             
                lbID.text = m.GET("ID_PC") 
                lbNombre.text = m.GET("NOMBRE_PC")
                lbUsuario.text = m.Get("USUARIO")
                '
                lbFecha.text = m.GET("FECHA")
                lbVersion.text = m.Get("VERSION")
                lbMail.text = m.GET("MAIL")
                lbRegistrado.text=m.Get("REGISTRADO")
                lbUsos.Text =m.Get("USOS")
        End Select
        SaveStringExample
    Else
'        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub