problems with perl modules after being running the program with no problems

[silviapin...@gmail.com]

Hi,

I have been using circos for the last week with all the perl modules installed and no problems at all and suddenly I just had this error about the perl modules:

*** REQUIRED MODULE(S) MISSING OR OUT-OF-DATE ***

You are missing one or more Perl modules, require newer versions, or some modules failed to load. Use CPAN to install it as described in this tutorial

http://www.circos.ca/documentation/tutorials/configuration/perl_and_modules

missing GD

  error Can't load '/Library/Perl/5.18/darwin-thread-multi-2level/auto/GD/GD.bundle' for module GD: dlopen(/Library/Perl/5.18/darwin-thread-multi-2level/auto/GD/GD.bundle, 1): Library not loaded: /opt/X11/lib/libpng16.16.dylib  Referenced from: /Library/Perl/5.18/darwin-thread-multi-2level/auto/GD/GD.bundle  Reason: image not found at /System/Library/Perl/5.18/darwin-thread-multi-2level/DynaLoader.pm line 194. at (eval 29) line 1.Compilation failed in require at (eval 29) line 1.

missing GD::Polyline

  error Attempt to reload GD.pm aborted.Compilation failed in require at /Library/Perl/5.18/darwin-thread-multi-2level/GD/Polyline.pm line 45.

I have re-installed the perl modules and everything is up to date with no problems in the installation. I have no idea why I still have this problem. Somebody could help me?? 

Thanks