Can't get hot deployment to work with tomcat

I'm having trouble getting hot deployment to work with Tomcat (v6.0.32). Pretty much I want my static resources (jsp, JavaScript, CSS) files to be deployed when a file is saved.

I've gone through the docs and it says I'm supposed to select a 'Update resources' setting for the On 'Update' action field. However, that option is not listed for me:

Anyone have any ideas what I'm doing wrong? It starts to get really annoying to wait for a build and restart after every change.

Thanks for any help.