One thing you need to be careful of is to ensure that QTP is launched before the .Net application otherwise you will see only WinObjects. If the problem persists, you can rerun the dll registration by running QuickTestProfessional.NETAddin.bat in the bin folder.
If you had to identify, in one word, the reason
why the human race has not achieved, and never
will achieve, its full potential that word would be "meetings".