System Freeze with freebsd-5.3-Release-p5

[Lin, Tsung Ching]

hi everyone,

I want to upgrade the mail server from 4.10 to 5.3 on IBM xSeries 335.
If I enable nis client and config the second network interface, 
the system alwayse freeze without any log.
If I boot the system first, then config the second network interface,
the system still freezes.
If I only eanble nis client or network interface, the system is ok.
how do I solve this problem??
thank you very much.

-- 
Lin, Tsung Ching <tclin at iis.sinica.edu.tw>
Institute of Information Science, Academia Sinica