Exercise not registering??

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Hiya!
I'm using my inbuilt motion processor on my iPhone to track my steps and 'earn' more calories. Problem is, it takes ages to update my calories!

So for example, I just went for a walk and walked 4000 steps, bringing my total step count for today to 5300. In MFP though, it says that exercise has only given me 30 extra calories. I know it's likely to be closer to 150.

I've tried refreshing and even deleting the app/reinstalling but it won't budge!

I tried also to link MFP to another pedometer app called Pacer. Pacer would tell me I'd walked 5000 steps, which equates to 245 calories. In MFP that would show up as 5000 cals, but 328 cals!

I've tried everything and can't seem to get MFP to update or to work properly with other apps. ://