Preoblems with "HDG SEL" and ILS capturing.

[TomEDDW 1]

Hey everyone!Please excuse if this has been discussed earlier. But today I experienced a "new" Problem for my PMDG 73NG.I simply can NOT track a Heading using the HDG Selector. When its tuned ON the Plane keeps the current Heading. When i try to manipulate to some other course it does nothing. it just keeps flying the current course.And since this happened i cannot capture any ILS approach.It just keeps flying an interception heading, cross the "approach centerline" and goes off to somewhere else.The Glideslope works normal.Can please someone healp me out?RegardsThomas

[Tabs 2,790]

Thomas,What does the roll mode annunciation on the PFD say when you're seeing this happen?