At this point you should be able to login with the credentials you normally use to log to Word Press administration panel.
If something is still not working, submit your debug log and we'll do some heavy troubleshooting.
I was just trying to test the script on your installation when I was logged out and was no longer able to log in. so you click the “Set Next GEN featured image” and this is were the problems start?
We are talking about the following scenario: you are on a single post/page/portfolio and want to set a feature image, and instead of choosing one of the default media library you want to use one of the next gen gallery.
I am able to set a feature image from the nextgen gallery without problems… Before writing this answer, I’ve tried to replicate the issue for the last time, and while I was on the admin panel, I received a theme update notification, installed it (3.4.3) and now it’s finally working properly!Once I get the new login credentials I will check it on your server, maybe I get a js error or something similar that shows us the direction… You can test this your parameters by copying and pasting the Server URL value into your web browser's address bar - the browser should open your Word Press blog's home page. Enter the concatenated URL the web browser's address bar - you should receive the following message: This means you have specified the parameters correctly, and the XMLRPC service is enabled.If you get an errors message or a blank page, the XMLRPC service is either disabled, or something your hosting environment is interfering with the XMLRPC handler.
I also found that in some cases GET request are working fine, but POST requests could be blocked.There is an online tool at it, which you can use to send an empty POST request to your site. This is usually the case with shared hosting environments. A frequent cause of upload and connection related errors is the mod_security module.