I added the folder that my app downloads the PDF's to the priviliged folder list.
This seems to clear up almost all of my issues.
The one remaining issue is that if i try and open up multiple pdf's (all printing automatically) at the same time there are a certain few that will hang. It is always the same pdf's that will hang, and doesn't seem to matter how many working pdf's are opened before that one.
ie if 1,2 work and 3 doesnt.
opening each seperatley will work.
opening 1 and 2 will work.
oepning 1 and/or 2 then 3 will cause 1 and 2 to work while 3 hangs.
If 1 or 2 is open then i open 3 it will hang.
And just for fun this occurs in Windows XP SP2 but not Vista (rtm or sp1) It also does not occur in adobe reader 8.x in both xp and vista.