lfte resolve host address Problem

[hjj]

Dear:
    I use lftp Version 3.05 
    Linux debian 2.6.6-1-686 sarge testing

I have a ftp site  ftp://jjyy.chanix.net  it is a dynamic domain name
use lftp
#lftp 
lftp :~/open jjyy.chanix.net

then resolving host address will failed

i set timeout 30 seconds(only change this ,all others use default)

but ping jjyy.chanix.net look good ,it can resolve address right
and netkit-ftp works fine
and lftp ' open ip works fine, just open  hostname not work
and open ftp.redhat.com work good

so i think it's lftp' dns resolve may have some problem.

if u have some time , check it :)    thanks a lot

yours
Hjj