Monty Spam


I am using Monty Spam to block spam.
It works very well and I like it very much, except that it doesn't work for one blog, which is,
Only that blog has spam comments.

Can you help me please?
If you cannot, because it is not made by you, could you recommend other plugin to control the spam?
Does Anti-Splog takes care of comments too?

Thank you in advance!