proxio on "[Plugin: W3 Total Cache] URGENT => Blank page (Cloudflare + W3TC)"

Hi,

2 problems on our website :

1/ website is ok on http://www.xxxx.com but blank page on xxxx.com (but seems that xxxx.com/YYYY is working fine)

2/ purge all cache button when clicked lead to a blank page NOT RESOLVED....

I use W3TC and cloud flare .... plz help !

http://wordpress.org/plugins/w3-total-cache/