I can not connect to server authentication.
IE rigidly configured proxy (can not disable). Open NAT, but Ext Designer automatically determines the proxy and tries to connect through it.
Connecting via a proxy does not work for some unknown reason (does not pass authentication), but we know that works through NAT.
You can make a point in the future in the form of authorization Ext Designer: "No auto, no proxy"?

WinXP, ExtDesigner 1.0.2