How To Lock phone After 6.5 Upgade?? Old Way Not Working Now.

[eazycj]

The end phone call button held down used to lock the phone now the hour glass comes up but doesnt do anything. If I shut off the phone and restart it asks for a password but how can I lock when its on? BTW I am newbie to tweaks and my phone is stock 6.5 not unlocked and I dont have any registery editors etc