Before you can access the counter application from your web browser, you must register it with Seaside. Type the following code into a Transcript or Workspace and then type CTRL-d or use the "doit" menu item. Afterwards, make sure to commit your code.
WebCounter registerAsApplication: 'WebCounter'.
Note that this expression can also be added in the class
initialize method which is invoked at the time the class is loaded in memory as shown below.
self registerAsApplication: 'WebCounter'