Help. Pg not running

Dear All,

I'm sorry, I'm a beginer in PostgreSQL.

I have problem with my PostgreSQL after my server un complete shutdown.
When i want to run postmaster there some error massage and postmaster can't
run.

this is the massage :

DEBUG: database system was interrupted at 2003-06-28 02:41:38 JAVT
DEBUG: open(logfile 0 seg 0) failed: No such file or directory
DEBUG: Invalid primary checkPoint record
DEBUG: open(logfile 0 seg 0) failed: No such file or directory
DEBUG: Invalid secondary checkPoint record
FATAL 2: Unable to locate a valid CheckPoint record
/usr/local/pgsql/bin/postmaster: Startup proc 1747 exited with status 512 -
abort

What i must to do to fixing this problem ?

Thank's a lot.