Thanks Gavin for getting back to us. I am using Logic pro 8.0.2, 4gb ram mac OSX 10.5.6, 2.2ghz. When i load up the interface it seems to have jammed... I can't bring up any of the tabs at the bottom (i.e. sounds, effects, etc) i have found that if i switch to controls view and back again, i can bring these up, though i only have limited functionality, ie if i try and link up one of the modules, the entire thing jams up. Is there anything that can be done to sort it out? It only used to happen if i was using it for over about half an hour, and didn't happen at all for the first couplke of weeks after i bought it, but now its jammed whenever i open it up. I have just started a new project, so i will let you know how that affects it. Thanks, Algy Strutt.