HTTP Error 500.21 - Internal Server Error Handler "ScriptHandlerFactory" has a bad module "ManagedPipelineHandler" in its module list

Hi to everybody.

I'm new to IIS + ASP and i need desperately yout help. I want to create WebService and use them via .asp WebPage. So, i create a WebServices dir to default IIS website directory(C:/inetpub/www/.....) and via VS 2008 (Hosting on Windows64bit - 7 Proffesional) create new web services application. The deafault , sayHello.

 So far so good......

When i create a WebPage via .asp and add perform -->add Web Reference -->locate the WebService the following error come up:

  Handler "ScriptHandlerFactory" has a bad module "ManagedPipelineHandler" in its module list

Google-it i found that the erorr could be in configuration of IIS but i can't find what is wrong???

Thanks