[htdig] CGI error in htdig

[Kin]

After completed the setup of htdig, I start to test it with the search page, but the following error found :   CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are:   I change nothing in the htdig.conf, so it will get data from www.htdig.org, the database of result index is found in the db folder. So what's wrong with my configuration??   Thanks in advance   Kin