I have just tried to OTRS (3-3.

I have also installed some modules (But some are not installed like GD etc....).
I have notice all services running fine (MYSQLD,OTRS and HTTPD).
But when i tried to open otrs in firefox using "http://yourhost/otrs/index.pl" am getting a page cannot be find/displayed error .
Is that mandatory that all modules should be installed .
Modules Missing :
o DBD::Oracle......................Not installed! (optional - Required to connect to a Oracle database.)
o GD...............................Not installed! (optional - Required for stats.)
o GD::Text.......................FAILED! Not all prerequisites for this module correctly installed.
o GD::Graph......................FAILED! Not all prerequisites for this module correctly installed.
Am getting this error while trying to install modules through CPAN :
**UNRECOVERABLE ERROR**
Could not find gdlib-config in the search path. Please install libgd 2.0.28 or higher.
Warning: No success on command[/usr/bin/perl Build.PL --installdirs site]
LDS/GD-2.56.tar.gz
/usr/bin/perl Build.PL --installdirs site -- NOT OK
Failed during this command:
LDS/GD-2.56.tar.gz : writemakefile NO '/usr/bin/perl Build.PL --installdirs site' returned status 512
While starting HTTP am getting below ,
Starting httpd: [Tue Dec 30 17:20:51 2014] [warn] The ScriptAlias directive in /etc/httpd/conf.d/zzz_otrs.conf at line 5 will probably never match because it overlaps an earlier ScriptAlias.
[Tue Dec 30 17:20:51 2014] [warn] The Alias directive in /etc/httpd/conf.d/zzz_otrs.conf at line 6 will probably never match because it overlaps an earlier Alias.
httpd: Could not reliably determine the server's fully qualified domain name, using *.*.*.*(IP) for ServerName
Thanks in advance .