<font color="blue">Let me see if I have understood your problem properly. You are clicking on the 'Tests' node in the left pane; right? What you need to do is create a new test by right-clicking on the 'tests' node. You may then double-click the new test to open the test pane.
Scripts and Tests are two different things. Its fine you have crated a new script but what I was asking was that have you created a new TEST or not. Right click on the Tests icon in the tree structure and then add a new test. Click on that newly created test to open the Test Pane.