Help!!! It hang up when i upgrade kernel,during the pc booting up its hang on the following messge, what is that mean??? and how do i fix it?? Thank you.

Warning! Invalid configuration file for exim4. Exiting.
Starting internet supersever: inetd.
Starting PCMCIA services: ip_tables: (c) 2000-2002 Netfilter core team
Cardmgr[2989]: watching 1 socket
cs: IO port 0x0100-0x04ff: excluding 0x3b0-0x3df
cs: IO port 0x0800-0x08ff:_