Acegi 1.0.5 has Spring 1.2.9 as Maven dependency and it cause conflict with Spring 2 when I use it in my project as Maven dependency.
I have make it working by editing my local acegi-security-parent-1.0.5.pom and setting Spring version to 2.0.7. It also may be possible to exclude Spring 1 by adding exclusion/s tags to Acegi Maven dependency.
It may be better to correct it in source pom!
This is the problem that I had faced: