Couldn't find schema part: error when accessing the wsdl url using browser

Question

I have an xsd file Foo.xsd. I tried to refer it in a WSDL file as

xsd:import namespace="http://ws.test.com/types" schemaLocation="/xfire/Foo.xsd"

But when I try to access the wsdl url using browser I am getting the following error.

org.codehaus.xfire.XFireRuntimeException: Couldn't find schema part:

I am using xFire 1.2.6 for generating webservices.

Any input would be appreciated!