VB开发工具Inet控件上传文件失败问题

一、问题描述：

使用VB Inet控件，将指定文件上传至远程ftp服务器，在有的电脑上传成功，有的电脑一直卡在正在上传状态，直至超时。代码如下：

Private Sub Command1_Click()
Dim FileName, putfile As String

Dim mulu As String '上传服务器的文件夹名称

'设置FTP的地址、协议类型、用户名、密码

Inet1.URL = "ftp://172.19.101.41" 'FTP的地址

Inet1.Protocol = icFTP
Inet1.RemotePort = 21 'FTP端口

Inet1.RemoteHost = "172.19.101.41"
.

'协议类型

Inet1.UserName = "admin" 'FTP的用户名

Inet1.Password = "123456"  'FTP的密码
Dim Source As String
Source = "c:\123.log"
filesize = FileLen(Source)

 mulu= "testDir"
 Inet1.RequestTimeout = 300
 Inet1.Execute , "put " & Source & "  gongxiang\" & mulu & "\123.log"

Do While Inet1.StillExecuting

DoEvents

Loop
End Sub

Private Sub Inet1_StateChanged(ByVal State As Integer)
Dim temp As String

Select Case State

Case icNone

Case icResolvingHost

  t