Boot leakage

Recently I sealed the rear doors on my vRS using the guide on here and it worked brilliantly. I was wondering if there was any tips and tricks for sorting out a leaky boot, or is it just a new seal job?

I only noticed it the other night as I don't use the boot very often. I'm getting water on the'dry' side of the rubber seal pretty much all the way round, and there's quite a lot on the plastic trim around the catch.

Cheers