Hi, Adrian.

I just did a little Googling on this and found some discussion of this problem. Here's one:

http://www.chrisjames.me.uk/blog/_archives/2005/5/28/891895.html

We've had some problems with other Linksys routers over the years. They usually get things sorted out, but it sometimes takes a while.

Sorry we don't have a better answer for you here.

- Pete