actually, after msn upgraded to 7.0, the arrange version of Kopete from 0.81 to 0.92 can not sign in, the solution is upgraded Kopete's version to 0.0.93.
Don't try to upgrade to 0.10.1 if your KDE version is lower than 3.3.4. the compilation would not go through.
here is the link for Kopete 0.93:
http://easynews.dl.sourceforge.net/sourceforge/kopete/kopete-0.9.3.tar.bz2
you need to compile it by yourself.the install step I listed it below.
./configure
make
make test(optional)
make install
for more details, pls read README file and INSTALL...