portsnap FAILS! (why?!)

[Wojciech Puchar]

this way

root at hel# portsnap fetch
Looking up portsnap.FreeBSD.org mirrors... using portsnap2.FreeBSD.org.
Fetching public key... failed.


on FreeBSD-6.0/amd64, while working perfect on other machine with exactly 
same version of portsnap.

the difference is that other machine chooses portsnap1.freebsd.org not 2, 
but this always the second, and can't fetch public key.

how to fix it?