Inspector Problems or possible miss script.

So, my script should be loading up changes in the inspector, and most the most part it does, however it refuses to show my 'inventory' updates;

//inventory.cs snipit http://codeviewer.org/view/code:40e1

//my itemdatabase.cs http://codeviewer.org/view/code:40e2

Any ideas, i have been working on this error for days! Any help would be gratefully appreciated!