Searching a Wiki-Plugin for Rails

Hi all,

one feature/part of the rails project I have to do is a small
wiki-functionality.

I don´t want to reinvent the wheel so I am searching for a existing
wiki-solution as a rails-plugin.

I found insiki (http://instiki.org/show/HomePage) which has all
functions I need but I have really trouble to migrate the insiki-Projects
to mysql.

I tried by following these instructions but it does not work:

http://instiki.org/show/Instiki+and+MySQL
http://blogs.law.harvard.edu/hoanga/2007/02/07/migrating-instiki-from-one-database-type-to-another/

Does anybody have a solution for migrating insiki to mysql?
Or better: Does anybody know a working Wiki-plugin solution?

Thanks a lot.