OpenFire Errors

[10/17/2012 11:58:04 PM:655]
<stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:server" to="192.168.20.5" from="derptap01" xmlns:db="jabber:server:dialback" version="1.0">
[10/17/2012 11:58:04 PM:740]
<?xml version='1.0' encoding='UTF-8'?>
<stream:stream from="derpsvr01" id="1Ef0G" xmlns="jabber:server" xmlns:stream="http://etherx.jabber.org/streams" version="1.0">
<stream:error xmlns:stream="http://etherx.jabber.org/streams">
<host-unknown xmlns="urn:ietf:params:xml:ns:xmpp-streams"/>
</stream:error>
[10/17/2012 11:58:04 PM:740]
<stream:error xmlns:stream="http://etherx.jabber.org/streams">
<invalid-namespace xmlns="urn:ietf:params:xml:ns:xmpp-streams"/>
</stream:error></stream:stream>
[10/17/2012 11:58:04 PM:740]
</stream:stream>