patch20 fails

[rrr55 at daimlerchrysler.com]

Can anyone explain why this fails?  This was applied to source from
openssh.org.
Thanks,
Ryan
===========================

bash-2.05a$ /opt/freeware/bin/patch -p1
< ../openssh-3.6.1p2-passexpire20.patch
patching file TODO
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file acconfig.h
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file auth-pam.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file auth-passwd.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file auth.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file auth.h
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file config.h.in
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file configure
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file configure.ac
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file openbsd-compat/port-aix.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file openbsd-compat/port-aix.h
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file session.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
Hunk #5 FAILED at 748.
1 out of 6 hunks FAILED -- saving rejects to file session.c.rej
patching file session.h
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file sshd.c
Reversed (or previously applied) patch detected!  Assume -R? [n] y
patching file version.h
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file version.h.rej