[Ysharros]

I suspect you should be reading the initiate book -- I may have the name wrong, but basically there's a book per tier of harvesting, so you need to make sure you bought the one that requires 185+ skinning skill to read.

If that isn't it, the next thing I would try is to skin some more -- skills can take a long time to change especially past 200. From 200 to 220 you can still get points off creatures that are level 11-20, but levels 21-30 will work too (and will be the only ones that give you points after 220).

After that... it's possible for skills to get stuck, though it's not as frequent as most folks seem to think. At 350 mining, I've had dry spells of over a dozen nodes where I didn't get a single skillup. Anyway if nothing else seems to work, you might try petitioning. You may end up having to drop and retake the skill (which is a matter of picking a different primary, then repicking skinning) - but of course you'd start back at skill 1, so it's a last resort I'd say.