网络传输问题

我利用winsock控件编写了一个基于TCP协议的软件，只用来传递字符串。在XP下的局域网中测试没有问题，在Windows Server 2008服务器上确总是连不上。程序片段如下：
Private Sub Winsock1_Close()

    Winsock1.Close
    Winsock1.Listen
    Label1.Caption = "监听"
    Label1.ForeColor = RGB(255, 0, 0)
    Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "连接断开并进入监听状态"     
End Sub

Private Sub Winsock1_ConnectionRequest(ByVal requestID As Long)

    If Winsock1.State <> sckClosed Then
        Winsock1.Close
        Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "发出连接请求，端口暂时关闭"
        Winsock1.Accept requestID
        Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "接受发出的连接请求"        
        If Winsock1.State = sckConnected Then
            Label1.Caption = "连接"
            Label1.ForeColor = RGB(0, 128, 0)
            Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "建立了新的连接"
            Winsock1.SendData "接受"
        End If
    End If
End Sub

Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)
   
    Dim myStr As String
    Winsock1.GetData myStr
    Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "接收到数据"
    Text18.Text = myStr
    If Winsock2.State = sckConnected Then
        Winsock2.SendData myStr
        Text1.Text = Text1.Text + Chr(13) + Chr(10) + Format(Date, "long date") & " " & Time & " " & "将数据转发"
    End If
   
End Sub

请高手们解答，谢谢！