[Plugin: MoneyPress : Commission Junction Edition] Plugin not working

Hi, I’ve just installed the plugin, but the page where should be displayed the results returns a message error such as “Fatal error: Call to a member function xpath() on a non-object in D:\hosting\xxxx\xxx…”. Please let me know what about is this issue and how to fix it.
Thanks,
Victor

http://wordpress.org/extend/plugins/moneypress-commission-junction-le/