新VPS上的VQmod没有写vqcache文件或日志文件

I am just moving an opencart site to a staging server and have vqmod installed in the site however I can't get vqmod to create the vqcache files and it isn't even logging any errors in the vqmod/log folder. I've basically set the directory structure to 777 to get it to work from a permissions point of view and everything is ownership user:www-data but still no joy.I am just moving an opencart site to a staging