I had some problems compiling Atlas 0.3.0 so maybe reading this thread will help...http://www.flightgear.org/forums/viewtopic.php?f=11&t=7407
As well, there's a bunch of info on the Atlas project page here that might be helpful...http://atlas.sourceforge.net/
And, finally, there's an Atlas mailing list where you can get lots of help, located here:https://lists.sourceforge.net/lists/listinfo/atlas-devel
Hope that's helpful...
P.S. If you haven't tried it yet, the CVS version of Atlas is really
cool! They've added a bunch of new features that are well worth the trouble of compiling and installing it. Info on how to get it are on the main Atlas project page (see URL above).