pkg_add issue

greetings

i am getting the following error from pkg_add

# pkg_add vim
pkg_add: Can't process http://ftp.NetBSD.org:80/pub/pkgsrc/packages/NetBSD/amd64/6.1/All/vim*: Non-recoverable resolver failure
pkg_add: no pkg found for 'vim', sorry.
pkg_add: 1 package addition failed

some background information,

i am running netbsd on virtualbox

it seems i can connect to the internet with no problem

i pulled pkgsrc via cvs

and ping ftp.netbsd.org resolves fine

/etc/resolv.conf contains the following lines
# Generated by resolvconf
nameserver 10.0.2.3

so it seems at least to me that my netbsd virtualbox vm, is setup fine

any hints where to look?

regards