iPhone Accelerometer still not registering!

I have a game where you control the character with the accelerometer. The problem is the accelerometer works about 90% of the time, the other 10% it doesn't seem to be sending any data.(So the player is unable to move)

I've heard changing the color-format to kEAGLColorFormatRGBA8 often solves this problem but it didn't for my app. Here is the code

// Get the layer
 CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer;
 
 eaglLayer.opaque = YES;
 eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
 [NSNumber numberWithBool:NO], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil];

I've also heard you need to specific the delegate first when you start the accelerometer.

//Configure and start accelerometer
 [[UIAccelerometer sharedAccelerometer] setDelegate:self];
 [[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / kAccelerometerFrequency)];

Finally, here is where I do my accelerometer calculations:

// Implement this method to get the lastest data from the accelerometer 
- (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration 
{
 //Use a basic low-pass filter to only keep the gravity in the accelerometer values
 _accelerometerX = acceleration.x * kFilteringFactor + _accelerometerX * (1.0 - kFilteringFactor);
}

Does anyone see where I'm making my mistake?