Creating network of sites in Wordpress

I have a wordpress website. I am planning to add two more languages in addition to the current language. So I want to create a separate site for each language using a network of sites feature of the wordpress. I myself tried to install a network of sites adding some lines to [login to view URL] and then following instructions at Tools => Network feature inside dashboard. I probably did something wrong because my admin dashboard went blank after the installation. I replaced [login to view URL] and htaccess with its original files. I now have access to admin dashboard, but when I try to save any settings or even edit posts and then hit save button, the screen again goes blank. WHAT YOU NEED TO DO First, I need you to resolve this blank page issue inside admin dashboard and then enable a network of sites using wordpress instructions. After the installation, I want you to create two sites for English and Russian. The default site url will be used for the current language of the site. You will have access to my ftp, wordpress admin and myPHPadmin accounts. I pay $30 for this job. Let me know if you have any questions. I need the work to be done ASAP. Thanks.