The web application will have been built with human users in mind, and probably cannot 'sense' non-human input like the Write stage. I would guess there is some sort of event handler that reacts to keystrokes and that is how the app 'knows' there has been input. GSK should work and GSKE definitely should work, provided you are using it correctly. 1) the application must be in focus 2) the cursor must be in the field 3) you must separate Activate, mouse click and key stroke with small pauses, otherwise BP will execute those steps too quickly for the app to react. Once the cursor is in the right place, try GSK or GSKE with the root element of Application Modeller.