Отправка SMS с модема: исправить код - VB

Формулировка задачи:

Пишу на VB6 программу SMS-оповещений о различных событиях на сервере. Лог программы:

Чтение файла sms.cfg
Чтение файла tasks.cfg
Открываем порт COM4
Успешно
>> AT
<<
OK
>> AT+CLIP=1
<<
OK
>> AT+CMGF=1
<<
OK
>> AT+CMGS="+79166366660" <<
ERROR
>> THIS IS A TEST MESSAGE

Выдаёт

ERROR

на

AT+CMGS="номер"

почему такое может быть? Через HyperTerminal тоже пробовал вручную вбивать - ошибка. Модем - Alcatel one touch x090s Код может немного кривоват, но вроде ошибок нет

Private Sub Command1_Click()
    Dim z As String
    z = SendCmd("AT" & vbCrLf)
    z = SendCmd("AT+CLIP=1" & vbCrLf)
    z = SendCmd("AT+CMGF=1" & vbCrLf)
    z = SendCmd("AT+CMGS=" & Chr(34) & "+79166366660" & Chr(34) & vbCrLf)
    z = SendCmd("THIS IS A TEST MESSAGE" & vbCrLf & Chr(26))
End Sub
 
Private Sub ModemTimer_Timer()
    If Not Modem.PortOpen Then
        On Error Resume Next
        Modem.PortOpen = True
        Log.Text = Log.Text & "ГЋГІГЄГ°Г»ГўГ*ГҐГ¬ ГЇГ®Г°ГІ COM" & Trim(Str(Modem.CommPort)) & vbCrLf
        If Modem.PortOpen Then
            Log.Text = Log.Text & "Г“Г±ГЇГҐГёГ*Г®" & vbCrLf
            ModemState = STATE_ON
        Else
            Log.Text = Log.Text & "ГЋГёГЁГЎГЄГ* Г®ГІГЄГ°Г»ГІГЁГї" & vbCrLf
            ModemState = STATE_OFF
        End If
    End If
End Sub
 
Private Function SendCmd(c As String) As String
    LastCmd.Text = ""
    Dim ModemOut As String
    Dim ModemIn As String
    Dim Counter As Long
    
    Counter = 0
    
    If Modem.PortOpen Then
        ModemState = STATE_BUSY
        ModemOut = c
        Modem.Output = ModemOut
        Log.Text = Log.Text & ">> " & ModemOut
    End If
    
    If Modem.PortOpen Then
        ModemIn = Modem.Input
        ModemState = STATE_BUSY
    Else
        ModemState = STATE_OFF
    End If
    
    Do
        Counter = Counter + 1
        Sleep 10
        If Len(ModemIn) > 0 Then
            Log.Text = Log.Text & "<< " & ModemIn
            LastCmd.Text = ModemIn
        End If
    Loop Until Len(ModemIn) > 0 Or Counter >= 500
    If Trim(ModemIn) = "" Then ModemIn = ""
    ModemState = STATE_ON
    SendCmd = ModemIn
End Function

Решение задачи: «Отправка SMS с модема: исправить код»

textual
                            Листинг программы 
                        

                            'ГЋГЎГєГїГўГ«ГїГҐГ¬ API ГґГіГ*ГЄГ¶ГЁГЁ
'Г„Г«Гї Г®ГІГЄГ°Г»ГІГЁГї Г±Г®ГҐГ¤ГЁГ*ГҐГ*ГЁГї ГЁ ГЇГ®Г«ГіГ·ГҐГ*ГЁГї ГҐГЈГ® Г¤ГҐГ±ГЄГ°ГЁГЇГІГ®Г°Г*
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" (ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
'Г„Г«Гї ГіГЎГЁГўГ*Г*ГЁГї Г¤ГҐГ±ГЄГ°ГЁГЇГІГ®Г°Г*
Private Declare Function InternetCloseHandle Lib "wininet" (ByVal hInet As Long) As Integer
'Г„Г«Гї Г®ГЎГ°Г*Г№ГҐГ*ГЁГї ГЄ URL
Private Declare Function InternetOpenUrl Lib "wininet" Alias "InternetOpenUrlA" (ByVal hInternetSession As Long, ByVal lpszUrl As String, ByVal lpszHeaders As String, ByVal dwHeadersLength As Long, ByVal dwFlags As Long, ByVal dwContext As Long) As Long
Private Sub Command1_Click()
Dim a As Long, b As Variant, Prefix As String, Message As String
'Г±Г®Г§Г¤Г*ГҐГ¬ Г±Г®ГҐГ¤ГЁГ*ГҐГ*ГЁГҐ ГЁ ГЇГ®Г«ГіГ·Г*ГҐГ¬ ГҐГЈГ® Г¤ГҐГ±ГЄГ°ГЁГЇГІГ®Г°
a = InternetOpen("Microsoft Internet Explorer 5.0", 0, vbNullString, vbNullString, 0)
'Г®ГЎГ°Г*Г№Г*ГҐГ¬Г±Гї ГЄ Г±Г¶ГҐГ*Г*Г°ГЁГѕ Г± Г§Г*Г¤Г*Г*Г*Г»Г¬ГЁ ГЇГ*Г°Г*Г¬ГҐГІГ°Г*Г¬ГЁ
b = InternetOpenUrl(a, "http://www.mts.ru:5051/cgi-bin/cgi.exe?function=sms_send&MMObjectType=0&MMObjectID=&To=" & Prefix & txtNumber & "&Msg=" & Message & "&Hour=23&Min=59&Day=31&Mon=12&Year=2005&Lang=2", vbNullString, 0, 0, 0)
'Г§Г*ГЄГ°Г»ГўГ*ГҐГ¬ Г±Г®ГҐГ¤ГЁГ*ГҐГ*ГЁГҐ
InternetCloseHandle a
End Sub
                        