Mailman CGI error!!!

The expected gid of the Mailman CGI wrapper did not match the gid as set by the Web server.

The most likely cause is that Mailman was configured and installed incorrectly. Please read the INSTALL instructions again, paying close attention to the --with-cgi-gid configure option. This entry is being stored in your syslog:

Failure to exec script. WANTED gid 99, GOT gid 48.  (Reconfigure to take 48?)

 OS: redhat7.2

 maiman:mailman-2.0.5

 question -----> how to fix it !!!!!

 Please tell me!!!! thanks!!