[2008] FTP PASV Problem

[max_carpenter]

HI, I know its not really a vb.NET problem but does anyone know what causes a VB.Net app to kick out the following:

System.Net.WebException: The server returned an address in response to the PASV command that is different than the address to which the FTP connection was made.
at System.Net.FtpWebRequest.CheckError()
at System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
at System.Net.CommandStream.Abort(Exception e)
at System.Net.FtpWebRequest.FinishRequestStage(RequestStage stage)
at System.Net.FtpWebRequest.GetResponse()
at Utilities.FTP.FTPclient.Download(String sourceFilename, FileInfo targetFI, Boolean PermitOverwrite)
at IT_Management_Client.Updater.Updates.Check()




I know its not my code it self because it works to other destinations and it works if I do it internally but as soon as I run it externally meaning it is having to go through our ISA server it kicks up that error. So its got to be an ISA problem but I am at witsend, I have posted on an ISA forum as well but its bugging the hell out of me.


Thanks in advance if anyones got any advice.

[max_carpenter]

no one got any ideas?