Predictive wethear application problem

Hello,

I am trying to build the predictive weather application by following the steps described in the tutorial, but I am facing the problem with "GetYahooWeatherInformation" service.

The error occurred is as follow-

[

Error executing service

Wrapped org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog. Cause: Content is not allowed in prolog.

]

I am unable to rectify it. I have added the api key which is provided in the tutorial document.

Please kindly help me in solving this error.

For reference i have attached WeatherThing code below.

Thanks,

Srujana