I'm trying to install Multisite on a site that already has two subdirectories. WordPress 3.4.2 is installed on the domain name. I read the Codex articles on the subject, checked with my host to make sure I had all pre-installation requirements, deactivated plugins,then pasted the line of code that's supposed to cause the addition of "Network" to the Tools menu, exactly where the instructions said. I even tried typing it in by hand because I found that advice in the support forum. I refreshed my browser, went to my dashboard - no Network. I then ran Bitnami's multisite installer to the finish. Although the messages from the installer seemed to indicate successful completion, "Network" did not appear. I tried activating a plugin that requires multisite and it gave me an error message that multisite was not installed. I tried upgrading php from 5.2 to 5.3, also no improvement. I searched the WordPress forum, Bitnami's forum and the web, to no avail. Can anyone tell me how to get multisite off the ground?