Would someone be able to tell me what I did wrong?

I'm using J Gecko, by the way.

java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
at java.io.BufferedOutputStream.flush(Unknown Source)
at java.io.DataOutputStream.flush(Unknown Source)
at XKb.d(rqg:427)
at XKb.A(rqg:392)
at Yn.S(bfb:5255)
at Yn.C(bfb:249)
at bl.m(bfb:5014)
at bl.doInBackground(bfb:6206)
at javax.swing.SwingWorker$1.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at javax.swing.SwingWorker.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

 

My bad. It's about J Gecko U.

 

Oh, I'm sorry this is quite new for me, so I might not know all the stuff you are asking for.

What do you mean by setup? Also, I boot homebrew via Haxchi. Yes, My Wii U and PC are connected to the same network.