Hi, I was wondering if anyone could help me. I purchased the ifly737 and the add-on Button Control..I start up both programs perfectly fine, no problems.Once inside the cockpit i start up the aircraft from the cold and dark panel and all is working fine.. the PO is doing all according to the tutorial checklist put up on this forum. I'm perfectly happy until its time to "call pre-flight checklist". I select the "preflight checlist" on the left panel and on the right one I switch between all available ones.. ex- the black screen" "command A" etc.. Nothing happens and I just sit there till my 30minutes run out.Please help me in a way that i can call these checklists... The ifly and the add-on seem to be amazing and have very good reviews... I love watching YouTube videos featuring these two and I'd love to be able to use :SThanksSean