[Koha] "Premature end of script" just after main logo page

[Nasimuddin ansari]

Dear All
I'hv installed koha without any error . But when When i am opening site
with 
http://localhost:80
or
http://localhost:8080
a scring appears having nicely written KOHA on it and after few second i
get below error. I m providing other details too.
Any help appreciated

1=URL of browse is:http://localhost:8080/cgi-bin/koha/mainpage.pl
and 
2=error message is as below:-

Server error!
    The server encountered an internal error and was unable to complete
    your request. 
    Error message:
    Premature end of script headers: mainpage.pl 

    If you think this is a server error, please contact the webmaster 

Error 500

    localhost
    Mon 01 Dec 2003 05:42:25 PM IST
    Apache/2.0.40 (Red Hat Linux)
3=http.conf entries is

#portrts to listen to for Koha
                                                                                
Listen 8080
# NameVirtualHost is used by one of the optional configurations detailed
below
#NameVirtualHost 11.22.33.44
                                                                                
# KOHA's OPAC Configuration
<VirtualHost 191.254.4.51:80>
   ServerAdmin root at localhost.com
   DocumentRoot /usr/local/koha/opac/htdocs
   ServerName shekhar
   ScriptAlias /cgi-bin/koha/ /usr/local/koha/opac/cgi-bin/
   ErrorLog logs/opac-error_log
   TransferLog logs/opac-access_log
   SetEnv PERL5LIB "/usr/local/koha/intranet/modules"
                                                                                
</VirtualHost>

#KOHA's INTRANET Configuration
<VirtualHost 191.254.4.51:8080>
   ServerAdmin root at localhost.com
   DocumentRoot /usr/local/koha/intranet/htdocs
   ServerName shekhar
   ScriptAlias /cgi-bin/koha/ "/usr/local/koha/intranet/cgi-bin/"
   ErrorLog logs/koha-error_log
   TransferLog logs/koha-access_log
   SetEnv PERL5LIB "/usr/local/koha/intranet/modules"
                                                                                
</VirtualHost>




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