In a message dated 96-08-01 08:06:47 EDT, emz@viper.nauticom.net (ERIC ZENO)
writes:

<< 
   Drew,
     Try this. Get it to a "unlocked position". Then disconect and
     plug the vacuume line in the engine compartment. If it stays in the 
     unlocked position the problem is the valve in the dash. I think
     thats where your going to find the problem. The axuator it self is
     spring loaded, therefore with out vacumme, the axil, would not engage.
      >>

A leaky diaphram in the actuator can also cause this problem.

Dennis.