Please ask questions concerning plugins by clicking on the "Ask a question" link on the plugins page. It has some advantages: one of them is that similar questions can be found easily.
If I look at the list of questions that has been ask concerning that plugin, the last one I see is this: http://vanillaforums.org/discussion/28220/mcserver-addon-screen-is-blank#latest
From the reaction there, I'd guess fixing that plugin is trivial. If not, please open a new discussion using the described link, give a detailed error description and I'm sure your problem can be solved!
Comments
Please ask questions concerning plugins by clicking on the "Ask a question" link on the plugins page. It has some advantages: one of them is that similar questions can be found easily.
If I look at the list of questions that has been ask concerning that plugin, the last one I see is this: http://vanillaforums.org/discussion/28220/mcserver-addon-screen-is-blank#latest
From the reaction there, I'd guess fixing that plugin is trivial. If not, please open a new discussion using the described link, give a detailed error description and I'm sure your problem can be solved!