Connection test failed in "Full text search setting" in Sugar 6.5 caused by Possible Cross Site Request Forgery (XSRF) Attack Detected

Hi,

Connection test failed in "Full text search setting" in Sugar 6.5. I found that it is caused by Possible Cross Site Request Forgery (XSRF) Attack Detected and i follow the suggestion by adding "$sugar_config['http_referer']['list'][] = 'localhost';" to config_override.php. But it still give same error message, any others config I should set to get it work?