FTP only works once after a Reboot then stops working

FTP only works once after a Reboot then stops working

The first time I FTP after a reboot it is fine after that i get the following message

C:\>ftp Any-A-Web-B-Site.com
Connected to Any-A-Web-B-Site.com.
Connection closed by remote host.

C:\>


I get the same problem with third party FTP Programs too.

Is this a VB.NET question?

Doesn't seem like one unless the VB code is used to implement the connection.