What do you mean, "won't work"?
I.m not a user of autocorrect, but my understanding of the functionality is that it only corrects words in the autocorrect list, and only as you are typing them. I don't believe it will retroactively change something or correct text you are placing or pasting.
In the AutoCorrect list, I've set up 'aln' to be converted to 'alternatively'. When I type in 'aln' and press Return or space, nothing happens...
No other Autocorrect entries work, either.
Had a similar post this week about Autocorrect not working in Greek, but I think that was CS5.
Is this probem in all files, i.e. it happens in every new file you create as well as in existing files you open, only in new files (old files still work), only old files, or only specific files?
Does it work if you set the language to US English?
The problem occurs in all files, and on two separate computers.
However, setting the language to English USA does appear to make AutoCorrect work. But I need UK, not USA...
I'm thinking this might actually be a bug, and it may be present in several, or all, versions. Working in US English, but not other languages is not a good sign.
There might be support files in a en_US folder that could be copied to a en_UK folder, or renaming the folder to US might work, if we knew which one, but I don't. That trick worked on missing help a couple of years back.