Other themes worked well. It an theme specific proplem.
i set WP_MEMORY_LIMIT to 128 mb and define('WP_DEBUG', true) in wp-config.php
The theme is 2-3 years old but i need this function in the portfolio.
If y press on "add to cart" blank screen appears and the most other function. At first the Theme worked but it i make changes it dosent . even i undo this changes, to the stats before.
i use the new version of woocommerce 2.09