[CentOS] CentOS 5 and fail2ban

I had fail2ban working against ssh and vsftpd in CentOS 4.4 but in 5 it 
only works against ssh and not vsftp. This is with the same conf files 
for fail2ban and vsftp which I used in 4.4. I suspect that the higher 
version of vsftp may be the cause.

Has anyone managed to get it work? Failing that, any pointers on how to 
downgrade to the vsftpd-2.0.1-5.EL4.5.i386.rpm used in 4.4?

__
Iain Lee