All users will have the Kitchen Sink -- the second row of icons displayed in Visual mode -- for both the Page and Post Editors.
Here are some ideas that might help you figure out what things are not working as you expect them to, when you use this plugin with WordPress.
Be sure that the Visual Editor is not disabled for the User experiencing the problem of not seeing the "Kitchen Sink".
For example, if you are the User experiencing the problem: in the WordPress Admin panels, go to Users then Your Profile in the Users submenu. The first setting is "Disable the visual editor when writing". The Checkbox must be Empty (no checkmark), then hit the Update Profile button at the very bottom of the panel.
In the WordPress Admin panels, you should be in the Posts or Pages submenu, on an Add New or Edit Page/Post panel. Please verify:
If the last point (see only one row) is your situation, then go to the Installed Plugins page of WordPress Admin panels. Be sure that the jonradio Display Kitchen Sink plugin has been installed and activated. If you are in a WordPress Network ("Multisite"), you may have to look at both the Network Admin's Installed Plugins panel and the Installed Plugins panel for the individual site you are investigating.
See the FAQ tab for additional information.