Squirrelmail local login works but not from somewhere else

Hello,

I just installed Squirrelmail and tested it locally (h**p://localhost/squirrelmail) and it works but when I try to login externally (h**p://***.example.com/squirrelmail) I get following error messages:
Error opening ../config/default_pref
Could not create initial preference file!
/var/lib/squirrelmail/data/ should be writable by user www-data
Please contact your system administrator and report this error.

Does anyone know why this could be? Permissions are set correctly cause it's working locally...

Hi,


Do you check the logs ..Post the logs so that it will be easy to
identify.