XenoByteZero

Hey, When I first start working on a project, the automation points work fine, i can add points and remove them (right click or DELETE). After reloading the project later however, I cannot seem to delete any of the automation points. I can still add them fine, but am unable to delete them at all (right mouse and DELETE do not seem to do anything) Is there a way round this issue, or is there a way to clear all the automation from a clip? Thanks, Xeno