Getting plugins to work that did work.

I updated my Bukkit .jar file, as usual. Some of my plugins didn't work.
Hear me out, here:
WorldEdit worked, but WorldGuard didn't. No one on the WorldGuard thread posted it about being broken, and it wasn't updated.

Whitelist 1.8 didn't work. I updated to 1.9 (that said it would fix the problem), and it still doesn't run.
On my server logs, it doesn't show any trace of failure of plugin loading.
Using latest Bukkit build since 9:15 PM on Feb 8th. (My server company tells me the time, not the actual build number.)

 

It show whitelist 1.9 being loaded?

 

How to get them working again? Put back the old bukkit. Is there something bothering oyu that you want to upgrade? Because bukkit is moving too fast for the plugins to keep up on a daily basis, so you have to wait a little first.