Hey! I’ve had the same problem with white screen and I’ve decided to write about my solution here – maybe it’ll help somebody.
First of all I’ve connected with support of the plugin and I’ve recieved the following answer:
“I recommend looking your server’s error_log file or contacting your web hosting provider to find out what error is happening when continuing on from Step 1”
So I’ve contacted to my hoster and he switched on some server options related to xml, something like xml reader or xml writer, I don’t know exactly. Here is the screenshot of my php options (plugin works properly with them) – http://img838.imageshack.us/img838/268/jwzk.jpg
That’s all. Good luck!