GWT standard hello world application: No dynamic controls

I installed GWT into Eclipse and created a project "hello".

I start the application using "Run as" > "Web Application"

When opening localhost:8888 I get an alert box "GWT project 'hello' may need to be (re)com开发者_JAVA百科piled."

When I click okay, I get

"Web Application Starter Project Please enter your name: "

but no input box or buttons apear.

Right click on the project -> Google -> GWT Compile solved the problem.