Could not load plugins

I have a problem. I have my CraftBukkit server but when I add some plugins like: BigBrother, DalaJail, Warn, Hungry ... I get tons of errors and plugins doesnt work. (when I start server) I have the latest versions of these plugins !HELP!

 

Did you changed the jar's ?
Do you have the latest version of craftbukkit ?

 

based on the error, it can't read the plugin.yml file in the jars you have. did you write the plugins? It sounds like the YAML is malformed...

 

I have the latest version of craftbukkit (downloaded from wiki) And the plugin.yml is missing in plugins that dont work... What to do?

 

if you didnt write the plugins then the only thing to do is go to the author. If you wrote the plugins then you need to make sure your project is set up properly so that the yml is included in your jar...