I'm really newbie to Perl and I hope nobody here minds if I ask a stupid question. But I would rather not say it's stupid because I'm totally stuck and I have fairly good knowledge in computing. So please help me install GD::Graph extension because it's needed to RT installation. Here's what I get when I try to install it:

t/bugfixes......1/33 Problems reading t/images/logo.gif (tried: GIF gi
+f) at t/bugfixes.t line 42


#   Failed test '_read_logo_file succeeds for gif with file extension'
#   at t/bugfixes.t line 42.


#   Failed test 'The object isa GD::Image'
#   at t/bugfixes.t line 44.
#     The object isn't defined
Problems reading t/images/logo_gif_noext (tried: gif) at t/bugfixes.t 
+line 46


#   Failed test '_read_logo_file succeeds for gif without file extensi
+on'
#   at t/bugfixes.t line 46.


#   Failed test 'The object isa GD::Image'
#   at t/bugfixes.t line 48.
#     The object isn't defined
Unsuccessful open on filename containing newline at /usr/lib/perl5/GD.
+pm line 125.
Problems reading t/images/logo_xbm_noext (tried: libgd best-guess) at 
+t/bugfixes.t line 46

#   Failed test '_read_logo_file succeeds for xbm without file extensi
+on'
#   at t/bugfixes.t line 46.

#   Failed test 'The object isa GD::Image'
#   at t/bugfixes.t line 48.
#     The object isn't defined
# Looks like you failed 6 tests of 33.
t/bugfixes...... Dubious, test returned 6 (wstat 1536, 0x600)
 Failed 6/33 subtests
t/colour........ok
t/data..........ok
t/error.........ok
t/use...........ok

Test Summary Report
-------------------
t/bugfixes.t (Wstat: 1536 Tests: 33 Failed: 6)
  Failed tests:  4-7, 22-23
  Non-zero exit status: 6
Files=6, Tests=118,  1 wallclock secs ( 0.05 usr  0.00 sys +  0.32 cus
+r  0.04 csys =  0.41 CPU)
Result: FAIL
Failed 1/6 test programs. 6/118 subtests failed.
make: *** [test_dynamic] Error 255
  BWARFIELD/GDGraph-1.44.tar.gz
  /usr/bin/make test -- NOT OK
//hint// to see the cpan-testers results for installing this module, t
+ry:
  reports BWARFIELD/GDGraph-1.44.tar.gz
Running make install
  make test had returned bad status, won't install without force
Failed during this command:
 BWARFIELD/GDGraph-1.44.tar.gz                : make_test NO
[download]

t/images/logo.gif exist.