Excuse my English, but its doing my nut in. I have loads of documents Im working with, and most of them are fine with using UK English and my custom.dic, but a doc I just started on today is a yankee bastard who wont use words from my custom.dic and corrects words like colour and metre, and it swaps "ise" for "ize" at the ends of my words. Also, the add to dic. option is greyed out.

Anyone help? Yeah I was looking at the dictionary options with it and I may have changed something but I cant remember now.