Unable to debug with Workflow Manager Tools 1.0 Preview

Hi

I am trying to debug a sample workflow deployed to Workflow Manager using WF Manager Tools in VS.Net 2012 (as described in http://msdn.microsoft.com/en-us/library/windowsazure/jj658563(v=azure.10).aspx)

However it doesn't work. When I run Microsoft.Workflow.TestServiceHost.exe I see the following output and that's it. Also strangely enough once I run the tool it puts these blank WF instances in WFInstanceManagement DB and removes them after I exit.

Listening at http://aklwin:12292/
Runtime and gateway started, press <Enter> to exit.
Instance '00000000-0000-0000-0000-000000000003' of workflow 00000000-0000-0000-0000-000000000003 Status: Started; Details: .
Instance '00000000-0000-0000-0000-000000000004' of workflow 00000000-0000-0000-0000-000000000004 Status: Started; Details: .
Instance '00000000-0000-0000-0000-000000000006' of workflow 00000000-0000-0000-0000-000000000006 Status: Started; Details: .
Instance '00000000-0000-0000-0000-000000000001' of workflow 00000000-0000-0000-0000-000000000001 Status: Started; Details: .
Instance '00000000-0000-0000-0000-000000000005' of workflow 00000000-0000-0000-0000-000000000005 Status: Started; Details: .