RDS server error

When I connect data services using blazeds I get following error message.

  RDS server message
  Premature EOF encountered

Why am not able to connect?

But when specify remoteObject in the declaration tags a开发者_StackOverflow中文版nd call the methods it works fine.

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i dont know the exact reason but this problem occurred when i was using Adobe Flash Builder Burrito. then i changed to Adobe Flash Builder Premium where it worked fine.