DB Structure Recovery

Hello!

My filesystem (UFS-FreeBSD) was crashed and I have lost files from
PGSQL DATA DIR FOLDER after fsck-utility.

I have lost files from directory "pg_xlog"
I reset my pg_xlog.

And now have such error by starting pgsql-server:

LOG: database system was interrupted at 2008-03-18 22:29:48 EET
LOG: checkpoint record is at 3E/6C000020
LOG: redo record is at 3E/6C000020; undo record is at 3E/6C000020;
shutdown TRUE
LOG: next transaction ID: 0/1624775486; next OID: 9528514
LOG: next MultiXactId: 6643; next MultiXactOffset: 13690
LOG: database system was not properly shut down; automatic recovery in progress
LOG: record with zero length at 3E/6C000068
LOG: redo is not required
FATAL: could not access status of transaction 6643
DETAIL: Could not read from file "pg_multixact/offsets/0000" at
offset 24576: Success.
LOG: startup process (PID 6267) exited with exit code 1
LOG: aborting startup due to startup process failure
LOG: logger shutting down

Is it possible to lose this problem?
HELP!!!