Probably, you've locked the HUD.
There are two ways to lock it (and thus, you'll need to unlock it the way you locked it):
- In the HUD settings:
- either on the HUD: Menu > Setup > Lock HUD
- or the HUD settings on the web page: Preferences > HUD Settings > Locking
- On the Wardrobe web page: Tools > Locks
If for some reason neither works, you can disable RLV, relog, and then detach the HUD.