Assimilation rate for Government in editor: is it working?

[Hondo]

I've editted the .bic file to make assimilation rates alot higher so I can help reduce the frequency of captured cities changing sides. Problem is, the changes don't seem to happen: Foriegn citizens seem to assimilate at the default rate no matter what rate I set. I'm a causal gamer, not a hardcore mod'er (although you guys do a great job!), but I've got other editted parameters to work in the game, and it all looks pretty simple.

Thanks.

Hondo