Outbound Ftp Aceess Blocked

[monkey64]

I wrote a vb.net 2008 program to upload a file to our web server.

The exe file works correctly when executed manually, but has issues when scheduled on the server.

 

It works for about a week, then just stops working. On the web server, I get a zero-byte file. I think this indicates that the data transfer is being blocked.

Debugging the procees also confirms this.

 

I tried all the usual things, such as permission levels on the server and everything is set to Full Control. I also changed the vb.net manifest file to level="requireAdministrator".

 

Here's the vb.net code I am using to upload.

 

My.Computer.Network.UploadFile("C:\update.php",
"ftp://ftp.myhosting.net/folder/htdocs/update.php", user, pass, True, 500)

 

What would I have to do to allow outbound FTP access to this .exe file?