Please help with document classification (nearest neighbor)! Total rapidminer novice here!

Hi everybody,

I just found out about Rapidminer a few days ago. I work for a nonprofit and have been interested in using data science to help sort grant applications. I think it could really help. I tried following a few tutorials and guides and eventually I got here (the attached process). But when I run the process, I get an accuracy of zero. I think there's something wrong going on with the categories. But yeah I'm lost, because I don't really understand the application and have just been following instructions. But I'm hesitant to really get to know RapidMiner until I can see the results and know that investing time will get me where my organization needs to be.

I would really appreciate your help.

Thanks everyone