Hi guys i am getting this error while uploading WSDL in Soup

Fri Dec 28 12:12:09 IST 2012:ERROR:com.eviware.soapui.impl.support.definition.support.InvalidDefinitionException
com.eviware.soapui.impl.support.definition.support.InvalidDefinitionException
at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlLoader.loadXmlObject(WsdlLoader.java:138)
at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getDefinitionParts(SchemaUtils.java:535)
at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getDefinitionParts(SchemaUtils.java:524)
at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionCache.update(AbstractDefinitionCache.java:97)
at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionContext$Loader.construct(AbstractDefinitionContext.java:226)
at com.eviware.soapui.support.swing.SwingWorkerDelegator.construct(SwingWorkerDelegator.java:46)
at com.eviware.soapui.support.swing.SwingWorker$2.run(SwingWorker.java:149)
at java.lang.Thread.run(Unknown Source)
please help me out.