Connection refused, but works on diff computer

Ok, i'm opening a connection to a web server using ssl (jsse) and this WAS working great. But now when I try to run the same code that was working on this computer (and still works upstairs) i get:
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at ..............
The line of code that is causing this problem is
OutputStream outputStream = null;
outputStream = conn.getOutputStream(); <- RIGHT HERE
the conn was setup and is not null because I can getURL() on it and it's context has been setup, so everything seems to be ok with the connection but once I try to get an output stream it blows with that connection refused exception. I have set doOutput to true aswell:
conn.setDoOutput(true);
Like I said, this code works on a different computer now and used to work on this one. If anyone knows what could have happened to this machine I could appreciate any help.
(used to work but now it doesn't box)
JDK 1.4.1
Intel processor
Windows 2000
(still works box)
JRE 1.4.1 (no jdk)
Intel processor
Windows NT
Thanks a bunch
-Dave

And can you ping the other computer from the one that doesn't work?

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