multisite installation problem

Hi, i've already installed a couple of times a multisite network.
Now i'm trying to do it with this domain (livingworldwide.com) hosted in bluehost but something is going wrong because after i activate the network and edited the wp-config and the htaccess, i refresh the site but i stays on a blank page.

I was wondering if can you give me this kind of support.

Many thank's
giulio