I think the "No lease, failing" error message comes when your device cannot negotiate a lease with your router. Which means your device, or router is not configured so they can connect.
Is it possible to turn of the security on the Wi-Fi?
Some routers, are not only protected by WPA, but also have a list of MAC addresses that are acceptable to connect to the router. So, even if your WPA password is correct, it may not have permissions connect.