Most likely one of two reasons:
1) The version of PCS you're using doesn't have the auto-turret feature implemented (I don't know if therre was such a version, but there may have been.)
2) You have the hiearchy names wrong somewhere. Take a screenshot of the heiarchy, either in TrueView or in the timeline animator thingy, whichever you use, crop it to just the relevant parts so we don't have to load up a 1024x768 pic, and post it here.

Hope that helps.
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