Make sure you either
- wait a little while after changing the registry
- use the shutdown feature; press and hold the on/off button, it'll pop up a question asking if you really want to shut down (on Wizard anyway - I suspect it's a WM5 feature, so it should be on Atom as well).
HTC Wizard::Qtek 9100 EN
ROM: 220.127.116.11 (9/22/05)
OS: 5.1.70 (Build 14402.1.1.0)