white page in taxonomy terms url

Question

I am using drupal 7, when I am going to path of terms I see only white page, no error and nothing in another page I have not this problem, some php properties are :

error_reporting = E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED & ~E_WARNING
max_execution_time = 360 
max_input_time = 120 
memory_limit = 32M
upload_max_filesize = 32M
post_max_size = 32M
mbstring.func_overload = 2
mbstring.internal_encoding = UTF-8

where is the problem? and how can I solve it?