WA works fine until I try to enter any data, like a search string or my userid/password for the web management interface. When I do this I get back the message

CGI Error

The specified CGI application misbehaved by not returning a complete set of

HTTP headers. The headers it did return are:

and nothing else.

In general, this error means that WA and the default web interface templates (DEFAULT.WWWTPL) may be out of sync, either because WA.EXE is backleveled, or the templates are backleveled.  The support group can help you ascertain which is the case.