My guess is the item is grouped and your are editing inside the group? For some reason in that case you can't nudge the points in that manner.
Break the group apart and try it again. Sorry that is the only answer I know.
Thankyou! Fixed. You're amazing. Buy yourself a pizza.
Glad that worked out. Because otherwise I would have been at a loss. I know the day I was having that problem I was almost at the brink of a break down...
wow you'd think they would have fixd this THREE YEARS later, but this is still an issue in cs6...glad i found this post.
Glad I could help!
There are still some really big old bugs in Flash that have been around since at least Flash 5 (I think CS6 is actually Flash 12?).
There are so many ****** problems with it that Adobe haven't fixed - they've just piled more features on top of them and hoped nobody would notice.