Samsung PL64E8000GFXZP - Manual (Page 146)

a popup screen appears on the
screen notifying you of the failure.
If you want to try using Plug &
Access again, disconnect the USB
memory stick, reset the AP, and
then try again from Step 1. You
can also choose one of the other
connection setup methods.
5. The network connection screen
appears, and the network setup is
done.