Adobe AIR for Android as3 codes not working for this one project

[Octopus-Sandwich]

I'm trying to use Accelerometer in my flash game, which works for every other project I'm working on, but for some reason on this one project if I try using it I get errors, using the same code i've used before, such as this. 

1046: Type was not found or was not a compile-time constant: Accelerometer.

1180: Call to a possibly undefined method Accelerometer. 

This is a fairly old file, not that old, so are there files I need to add to it to get it to work, or settings I need to change? This is very frustrating, I don't know what the problem possibly could be. Can anybody help me?

[Ned Murphy · Accepted solution]

The error message is indicating it cannot find the class.  Make sure you are importing it:

     import flash.sensors.Accelerometer;