I cannot get Aria / GPO 4 to appear at all in Logic Express. Are the two compatable? I have followed all the instructions I found on You Tube for installing GPO 4 into Logic Pro and all goes well - until I get to the stage where I click on the grey area under I/O. This is where I should find the links 'All instruments - Garritan - GPO' to bring up the Aria player and install the GPO sounds but these links do not appear so I am stuck. I have tried clicking on different boxes etc, all to no avail. The sequencer plays the Logic sounds fine so there is no problem with my set up. Can anyone offer any advice or a solution? Thanks.