rockslash5

Hey there, basically i always use to use guitar through my computer through my line 6 ux1 through to garageband/logic pro to get my guitar sound. Recently i bought myself a valve amp and a shure sm57 to mic it up to record my amp that way. However no sound seems to be coming from the logic pro/garageband. I have all the inputs and outputs set as UX1, the mic is in the right slot on the UX1, yet nothing. Have updated all drivers and that wasn't the problem? Thanks