By the way, changing permissions from 755 to 644 yielded with the result that my website is unable to work AT ALL...
you didn't get that advice from any boonex staff, or any member that knows what they are talking about. 7 = folder and 6 = file permissions, you set folder permissions to file permissions, confused? so is your server
you didn't get that advice from any boonex staff, or any member that knows what they are talking about. 7 = folder and 6 = file permissions, you set folder permissions to file permissions, confused? so is your server
go and learn the basics