hi
I simply had the same problem on an old redhat 6.2 based system.

fact in the background was that autoconf did a bad job and resulted in errors for readline-test-calls telling me "too many arguments for readline()".

anyway...

reading the docs helps

mutella requires GNU readline 4.2 - well the current version according to www.gnu.org is 4.3 - I simply grabbed the tarball and installed it:
ftp://ftp.cwru.edu/pub/bash/readline-4.3.tar.gz

(you know - configure - make - make install) and since then - mutella also works...



ps. it's a real pain in the *** to have ot register the whole procedure just in order to be able to help on an open forum...