When i install ZendOptimizer-1.3.1-FreeBSD4.0-i386, fail!

See below:
==========
Welcome to the Zend Optimizer 1.3.1 Installation Script!
For more information on this script, see the Installation
section in the Zend Optimizer User Guide.
To continue, press Enter
Specify the location where to install Zend Optimizer [/usr/local/Zend]:
Confirm the location of your php.ini file []:

Are you using the Apache web server?
Answer(yes or no): yes
Specify the location of your Apache root directory [/usr/local/apache]:


php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.
php in free(): warning: recursive call.