I'm trying to skip the installation welcome screen (actually the first three screens: The Solaris Installation Program screen, Identify This System screen and date and time settings - not timezone settings). Everything else runs automaticly from jumpstart except these three screens, just need to get rid of there three f2 key presses.
It looks to me that the jumpstart is not communicating with the time server. Try changing the timeserver to localhost and see if it goes through unattended.
Whoa! When you said localhost I tried 127.0.0.1 (I know, it's a loopback not a localhost :|)and when that didn't work I deleted it. But with "localhost" it works like a charm. Thank you very much!