I can't get the accelerometer to work (XNA Phone Application)

I've tried to get my player controlled by the Accelerometer for my phone application but I can't figure out how to get it to work. I have looked at the help documentation. It is unclear whether I should be using an Accelerometer or a Joystick set as Accelerometer, or both. I have tried all those combinations.

Any best practices or more explicit instructions are appreciated. I have the behavior I want with a Touch Joystick, but an Accelerometer is the ultimate goal, masked for left and right motion only.

Thanks.

Phone - WP7.1, HTC Trophy

By in-build movement, do you mean the types from the movement drop-down? Yes, I was using the 8 direction type. Is there a more appropriate one to use? My assumption was that if I use the Joystick type:Accelerometers that was the right one, but my player doesn't move. I have his control assigned to Joystick 1.

Thanks for the assistance.

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I have attached my MFA file. I started over with a project dedicated to just trying to work out the kinks. Right now it is with an accelerometer joystick. I have tried with accelerometer object, too. One thing I am seeing with any variation I try where I get some movement (and it never feels right) is that it stops responding at all after about 10 seconds.

Any guidance is appreciated.

Steve