Have a look at http://www.sysinternals.com/Utilities/TdiMon.html

>Thank you for your reponse.
>
>But No. It has nothing to do with the FTP Server.
>
>The FTP server is offered by our ISP is always ON. As I mentioned, another computer on the same LAN, has no problem connecting right away.
>
>I believe the problem is that; Some application is blocking the FTP port. I need to know which PORT, and which application is blocking it.
>
>
>>Is the web server going to sleep, and now awakening before the FTP request timeouts.
>
>>>In my VFP8 application I use the Mabry FTPCtrl ActiveX module to perform certain ftp uploads/downloads.
>>>
>>?Sometimes, all of a sudden the module has problem connecting to the server.
>>>
>>>I turn off all the Firewalls and Virus / Worm Protections that I can see running on the Windows "System Tray", with no success. While another computer on the LAN, has NO problem connecting.
>>>
>>?Once this problem occurs, the only way I have been able to get it working again, has been to ask the user to reinstall windows!! (an embarrassing situation to be in)
>>>
>>>Is there some sort of a "Port Analyzer Utility" that can list "which ports are being used by which applications", and "which ports are being blocked by which application" ?
>>
>>>Of course, any other help or clue, would be greatly appreciated...
>>
>>Cyrus