some questions about ejabberd,spark and psi

[Mr Shore]

hi,every buddy
I've now installed a jabber server,right it's ejabberd mentioned above
and 2 jabber client,right again it's spark and psi
and I can connect to jabber server by spark
but failed by psi,saying 'certificate failed the authenticity
test;Reason:certificate is self signed'
and i follow this page to try to transport to MSN but once again
failed
the jabber server provided is obsolete so could anyone provide a valid
jabber server?
the third next is about the transport to MSN from ejabberd
i'm running windowx XP os,with python vertion 2.5
I downloaded the pyMSNT for windows but only to find it supports only
vertion 2.2
so is there any other way to transport to MSN besides pyMSNT?
any advice will be appreciated:)