Android Plugin and Asset Bundles

Hello,

I'm pretty new to Unity and have some general questions.

Right now I'm trying to get Asset Bundles to work on Android plattform. I'm a little confused as I can't find out which licenses I do need.

The Unity Store "License Comparison" claims I do need Unity Pro to use Asset Bundle functionality. Do I also need Android Pro Plugin to use it with the Android plattform?

The SDK on the other hand never mentions Android PRO..or at least I can't find anything related.

My current setup is Unity Pro and the cheaper Android Plugin. I've tried to run the 'AssetBundle.zip' example project. After uploading the generated asset files to a webserver the app downloads the files correctly but I don't see anything in the scene. Mac OSX standalone and Webplayer is working perfectly.

So what I'm doing wrong? If the smaller Android Plugin is not enough, why are there any error messages during the build process?

Thanks for any help!