I'd first verify that the following DLL is in the project (should be added by default) - Symantec.Components.Generated7.Altiris.ASDK.dll. If it's there try typing the name of some components (Remove Inclusions, or the word Collections, for example) in the search bar to get some results.
If nothing comes up, you'll need to regenerare that DLL against your SMP 7. Go out to Manager and double click the project above (Symantec.Components.Generated7.Altiris.ASDK). Run through the wizard, and hopefully it'll generate some components for you.