Errors on scripts loaded from assetbundles

Hi, I'm currently trying to set up my project to allow users to download mini games post release. Todo this I am trying to use asset bundles to facilitate this, one containing the new games scene and one containing the assets and DLLs for the scripts required. The problem I am having is that when I load the scene or a prefab from the bundle all the attached scripts are still there but a warning says "the associated script can not be loaded. please fix any compile errors and assign a valid script". Is there something obvious that I am missing or do asset bundles not work this way and I'm going to have to rebuild my scene on load?