Transport volume

Hi one and all, I have just migrated from 7.5 artist to 8 pro. Just wondering if maybe I have checked/unchecked a preference box somewhere but, my main volume slider in the transport panel has no audible effect. \I can adjust main volume via the mixer but in 7.5 I had instant access using the transport panel. I am happy to just reinstall if there is no simple fix/answer but any advice would be appreciated.
Many thanks in advanced,


IIRC, the transport panel volume slider is for the control room. Try looking into that.