Using ejabberdctl to work with ejabberd on remote host

I've got two Ubunta servers where installed two ejabberd servers. Ejabberd on first server is up, on second server ejabberd is down. I tried to connect and to apply commands (for example status) on first server using ejabberdctl on second server.

I tried two variants and got errors:

Firtst variatn:
sudo ejabberdctl --node ejabberd@host1IP --auth admin_login ejabberd admin_pass status
Failed RPC connection to the node 'ejabberd@host1IP': nodedown

=ERROR REPORT==== 13-Jul-2011::21:19:36 ===
Error in process <0.36.0> on node 'ejabberdctl@fullDNS2' with exit value: {badarg,[{erlang,list_to_existing_atom,["ejabberd@shortdns1"]},{dist_util,recv_challenge,1},{dist_util,handshake_we_started,1}]}

Second variatn:
sudo ejabberdctl --node ejabberd@fullDNS1 --auth admin_login vhostname admin_pass status
Failed RPC connection to the node 'ejabberd@fullDNS1': nodedown

Where host1IP - ip adress of first server
fullDNS1 and fullDNS2 - full dns names of servers. Exmple: server.domen.com
shortdns1 - short dns name of servers Example. server

What I'm doing wrong???
Thank you for attention.