Flash Builder "Unable to Connect" error

I am trying to debug a Flash Web Application using Flash Builder 4. However, I keep getting this error:

Unable to Connect

Unable to connect to th开发者_StackOverflow中文版e application to fetch profile data. Please try profiling the application again.

I am using Internet Explorer 8 (the same problem also occurs with Internet Explorer 7) with Adobe Flash Player 10.1.102.64 (the Debug Player). In other words, I installed the latest of everything.

For my launch configuration, I have used the path to an HTML file. This works fine for debugging but does not seem to work for profiling.

What is the problem here?

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Have you installed the debug version of Flash Player?

Please check here

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You have to use Version 10.0 of the Flash player (the debug version). Version 10.1 does not work with the profiler.

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try checking your output folder for the build is pointing to where you expect (and thus can see its dependencies)