Port installation problem

[elliptic at elliptic.plus.com]

I apologise in advance if this is a stupid question.  I am having
problrems installing ports  the ones that fail always do so with same
problem:

Attempting to fetch ftp://ftp.cs.cuhk.edu.hk/pub/....    Login Failure On
ttyv1

I have looked to see if i can change the ftp site,  i cannot ping
ftp.cs.cuhk.edu.hk net unreachable but can ping it without the cs in it.

Thanks

Matthew