How we fix error in wpsc-product

after adding wp_max_memory_limit to 256M in wp-config.php, same error showing but in different file see below:

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /home/myoemwhe/public_html/wp-includes/wp-db.php on line 1981

No, EVMIKNASERVER2.COM this is my host

It’s fixed, i have increased the memory limit with using this script in wp-config.php

define(‘WP_MAX_MEMORY_LIMIT’, ‘325M’);