Sounds like your app has an error in it (can't locate the newsadmin_setting.pl) The CGI header error sounds like you don't have the headers specified when your program throws an exception. Usually you have to do  print "Content-type:text/html\n\n"; to get the correct headers

Either that or if you are using CGI.pm print $cgi->header()

Most likely if you fix the error of not finding the other script you are trying to call then the header issue will go away.

But as a previous poster stated, you need to post the code so that we can tell for sure what the problem is.