I am unable to activate draftsight as when trying to do so, continually get prompted for credentials for the proxy server.  Even when entering correct username/password the box just returns.

The proxy authenticates via AD using NTLM

No matter how the credentiasl are entered (domain\\username, username@domain, or just username) it is not passing the credentials to the proxy, and without authenticating on the proxy no traffic is allowed through.

Changing the proxy settings is not an option as they are set by the domain admin, and the firewall only allows web traffic out from the proxy server.

Any ideas on how to activate?