The generate an xml link is ONLY
going to show in your admin panel of the gallery if these two things are true.
1. You have the vb integration on.
2. You do not have the plugin installed already which means uninstall any old plugins. We check your vb for a plugin with the id of pppro.
Content visible to verified customers only.
See how we check to see if your using vb4 and do not have the plugins already installed.
You do not have the correct plugins installed because if you did your navigation system would exist as well as the stylesheet both of which your missing. Even if your disabling a photopost pro plugin in your forum admin it is still installed.
You must uninstall any photopost pro plugin in vb and follow the instructions above.
As long as permissions are 777 on the xml files and that install directory exists and you run the adm-plugin.php script it will generate a plugin to install into vbulletin.