UDO debug/test on local web

Hi all

I have an issue in that I created a new Row Exit using Form Extension UDOs on P4310 out to a custom screen. I want to debug the custom screens code it to see how it behaves when passed in certain values.

When I run local web the UDO Row Exit is not appearing, so I can't obviously call my new row exit. I am guessing this is as I have no link to the AIS server where the UDOs reside.
So how can I do this?

Thanks

John