The GWT Developer plugins for Chrome can not install

I have install Google app engines in eclipse juno, and tried running the initial test code,when i copy the url and paste it in my chrome browser, it brings a page that says "Development Mode requires the Google Web Toolkit Developer Plugin" , whclick on the download "Download the GWT Developer PluginFor Chrome" buuton, it downloads and adds it to chrome, but when i refresh it, it brings back the  "Development Mode requires the Google Web Toolkit Developer Plugin" page, and i seem to run in circles, can any one help me out?

Bruce

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