1. ASSERT: make sure that you have an application on OpenShift that you imported to your workspace (and got a project for it)
2. ASSERT: make sure that you have a server adapter for this project
3. EXEC: in OpenShift Explorer: select the connection that you used when importing and pick Remove from View
4. EXEC: go to your server adapter and pick OpenShift->Tail files

Result:
Nothing happens. In the log you'll spot:

!ENTRY org.jboss.tools.openshift.express.ui 4 0 2012-11-23 22:49:23.742
!MESSAGE Failed to retrieve Application from the selected Server.
Please verify that the associated OpenShift Application still exists.

Expected:
The connection wizard pops up with the server, username filled in from the settings in your project (<project>/.settings/org.jboss.tools.openshift.express.ui.prefs)