From your note about poor english and the fact that the error is an unexpected comma in a .plugindata file, I suspect you are running into a problem with saving data in european format. Plugins have to include special handling for european formats or they will get errors when loading saved data that includes decimal numbers or accented characters.
The best solution for this is to post the error in the download thread for the plugin and ask the author to fix the plugin. The problem is very easily resolved and if they need assistance they can read the post on the Turbine forums at
http://forums.lotro.com/showthread.p...97#post5784197