Corolla- Tilt steering problem

I have a 2001 Toyota Corolla, The japanese version. It has the tilt feature on the steering wheel which allows the driver to adjust the steering wheel up and down. Recently i have noticed that the lever that locks the wheel in place after it is adjusted it not holding it securely. So when i am driving with the wheel adjusted up, it is dropping down unexpectedly. Whats going on there?

Probably the bolt(s) holding the locking mechanism has loosened and need to be tightened.

hey bro i took off the bolt assembly and checked it out and you were right...the screw needed tightening. Everything is working good now.....Can you believe i went to a mechanic and he told me i needed a new steering column. Thank god for these forums. Thanks man