hello, I'm trying to use several plugins - simple tags, nextgen gallery, page navi - that create a new tab on the admin menu when activated. However when I click on the tab to take me to the plugin options (http://.../wp-admin/admin.php?page=nextgen-gallery), i get a 404 error. Has anyone seen this before or have any idea what the issue could be?
Thank you for any help someone might be able to provide.
*Additional info: it only does this for plugins that create a new top menu tab. I have other plugins activated that create a new menu option under the 'Options' tab and it works fine. So in this case, PageNavi works fine but NextGen Gallery doesn't.