Are you sure you are in download mode, try diffrent usb cables, kill all kies processes with task manager, try to reinstall kies and then try again, also try heimdall, if you don't have mac and nothing else has worked, you could set up virtual mac and then use heimdall. Hope this helps
Edit: I'm not sure if I understanded right, but did you managr to get to cwm after you wiped and rebooted?
Sent from my sgs2 running cm9 using xda app
Samsung Galaxy Nexus Running Domination and Ak kernel
Asus Transformer Prime - Running cm10,1
Old:Samsung Samsung Galaxy S II - Running cm10.1 With Dorimanx kernel<3(gave to gf)
Old:Galaxy Note - was running cm10.1 (sold)
Old:Zte blade, it's over 3 years old but still running cm10.1