Cruzer U3 Micro not getting detected

My pen drive was working fine. Suddenly when i inserted into another PC ; the pc didn’t showed it as plugged. Later i plugged into another PC and its not showing . Tried in XP and Vista.

The LED light is continuously glowing.

Please advice me what to do. I don’t have backup and if possible i would like to recover all my data. 

Are both the CD and data drive not showing?  Is the Cruzer password protected?  Has anyone used your Cruzer other than you?