I keep getting the same annoying popup every two minutes.

http://www.eajmp.com/sw/5323/CD1331/ETdp=31295
This is the link, showed in the top bar of the popup.
I've already set the security levels of firefox and IE to the highest levels, but the (-)ing popup still finds it's way in. I've already discovered the cookie that's associated with it, but it just keeps reappearing. Now I've set Firefox not to accept any cookie at all, but the popup still appears.
I want to know if anybody has some tips/hints or maybe even the solution to this problem.

Xobim