hmmm so you can get ingame but can't connect?
well then you might reset your modem/router or maybe check if you do installed the driver of your modem/router.
windows can also block 9dragons from establishing conection with the net by using firewall.
alt+tab to see if there is a dialogue that say to block, unblock, cancel. And unblock it.
Or simply disable firewall in control panel.
EDIT: also tell me where you downloaded your client, because there are differnet client available.
best is to take the client from acclaim:
also connect to your fitted server: i live in belguim i choose europe as my server.