I'm having the same problem. I've set the crawler time out in the config for the generator, and gone into php.ini and modified the max_execution_time, adjusted the script execution timeout, and connection timeout to ridiculously high numbers and it's still stopping after a couple minutes. Do you have to do anything for PHP to use the updated settings in php.ini? We've got a site with 75000 pages, and really can't sit around all day restarting the script.