Running Automator application on OS 10.3.9?

I’ve got an Automator workflow that I wrote (OS 10.4.11) for use at work. They need it to also run at some of our other locations. The workflow works fine for me but some of the other locations are running OS 10.3.9 and are unable to use it. I thought that saving the workflow as an application would allow it to run as a standalone application without needing Automator.

Any idea’s what I’m doing wrong or is this just not possible?