Hi
This means that the e-uae can't start for some reason.
Maybe can't read or execute the files for permission reasons or no uaerc available.
The FAQs on x-amiga.net explain how to increase the 2 seconds timeout and how to stop the shutting down.
My suggestion is
boot with the install CD
mount the partition
check the logs in the /home/xamiga/ directory
check your .uaerc (in the same directory)
I would change the permission to the OS and kick.rom folder
Let us know if you need more info
good luck
BiL0