Hi Ladies and gents. I'm having Trouble when i connect my guitar to my imac I'm using the midi guitar cable that i bought from the Apple shop along with my imac a few years back. I'm just about to start recording some of my own music Bass,Drum,guitar. Everything is pretty much sorted but since i started to use garageband 09 i keep getting this message pop up (Below). It's getting to the point of frustration because no matter what option i select it will still pop up. Please can anyone shed any light on this for me and help please. Thanks.