There are to location for codeblocks plugins. One location is the install directory share\CodeBlocks\plugins and the other in your (user) application data appdata\codeblocks\share\codeblocks\plugins.
If you install the plugin via the menu Manage Plugins, it will be save in the appdata path. So if you have two different versions in the install dir and the app data dir this will cause problems.
So try to delete the old plugin. If this will not fix the problem check the file manifest.xml and modify the line that it looks like that.
<SdkVersion major="1" minor="11" release="11" />
PS: This problem will also appear if you try to use the cb nightly and building your own plugin. Just built cb from sources and link your plugin against the required libs.