.gz file as soap ui attachment doesn't open

Hello,

I have a webservice in which i get a response as attachment. This attachment is of type .gz.
When i click on the attachment tab the soap ui shows me the error screen without any error displayed.

In the Log file of Soap UI i have following error:
011-11-29 09:58:34,593 ERROR [errorlog] java.lang.NullPointerException
java.lang.NullPointerException
at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getSchemas(SchemaUtils.java:336)
at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getSchemas(SchemaUtils.java:302)
at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.loadSchemaTypes(SchemaUtils.java:176)
at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlContext.loadDefinitions(WsdlContext.java:265)
at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlContext.access$500(WsdlContext.java:53)
at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlContext$Loader.construct(WsdlContext.java:219)
at com.eviware.soapui.support.swing.SwingWorkerDelegator.construct(SwingWorkerDelegator.java:45)
at com.eviware.soapui.support.swing.SwingWorker$2.run(SwingWorker.java:111)
at java.lang.Thread.run(Unknown Source)

Soap UI version is 2.0.1

Its urgent for me can someone help me with this?