Distributed Application Dashboard

I am looking to do a dashboard for all our tier 1 applications showing their status. I know hat most of these are spanning multiple servers so a DA makes the most sense for how to monitor them. I have started create them and if I do some of the default dashboards using advanced and class of user created dashboards. What I am looking to do though is provide a list of DA’s that I want in the dashboard. If I do list and start typing in names of some of the DA’s some show up but some do not. Can anyone provide insite as to why they may not be showing up? I did create all of these using VADA.