Check you’ve followed the instructions included with the WordPress Plugin exactly. Done – didn’t solve problem.
Check that the Plugin has been activated in your Plugin Panel of your Administration Panels. Done – didn’t solve problem.
Deactivate and re-activate the Plugin to see if this makes it work. Done – didn’t solve problem.
Search the WordPress Support Forums for the name of the Plugin and keywords associated with the problem you are experiencing. Done – didn’t solve problem.
Check the WordPress Plugins Directory for the notes on the Plugin and links to issues reported in the Forums. Done – didn’t solve problem.
Go to the website of the Plugin author and check their blog and Plugin page for known issues or advice. Done – didn’t solve problem.
Search the web with the name of the Plugin and keywords associated with the trouble. Done – didn’t solve problem.
Post a question on the WordPress Support Forums with the name of the Plugin and specific problems in the title. For advice on how to improve your chances of getting help, see Finding WordPress Help.
Done – didn’t solve problem.
What is NGG using when the screen gets black ? Javascript ? XML ? It clearly must be a problem with this. In older versions of WordPress I didn’t have this problem.
(As for installing an older version of NGG, it is vital that the galleries om my site function). I cannot do troubleshooting for days on end and in the meantime have the galleries down. That is why I rolled back to an older version. I will gladly install the newer version again once it doesn’t disappear my galleries.