Yes you where looking for support at late hours.
However I think your in the UK you must be an early riser posting at 3 something AM twice and then again at almost 7AM
It is 550PM here right now and should be if I can remember 1050PM there?
As far as login you sure you did not mistype your password. I can login fine at your site.
Modaccess means a mod can access certain admin functions like approve ads etc etc Nothing crutial or server side. Moderate ads means whichever usergroup you set this for there ads are not displayed till you approve them