failed to read schema error in web.xml

Hello!
I am using Vaadin for the first time…
I have installed the required plugins(Ivy and vaddin).
Now whenever I create a new project(vaadin 7) it gives me an error in web.xml
It says …
failed to read schema document ‘http //www.w3.org/2001/xml.xsd’ because
1.could not find the document
2.the document could not be read
3.the root element of the document is not xsd:schema.

I am using kepler and tomcat 6
please help me with this error
13473.png
13474.png

You probably have XML validation enabled either in the project settings or in global Eclipse settings. Well, probably in the global settings, if it’s a fresh project.

Select Window → Preferences → Validation, and uncheck all validations that you don’t want. You can do that also in the project settings, if you prefer to have them enabled in the global settings.