Spybot find "Media plex??

[HBLEAV]

Hi all.

Today, for the first time.. when I go to my freebie site. that I've been using for years.(a forum).. I get this pop up..

***********************************************************
Spybot finds Media plex.. this is a known threat. do you want to block it.. I say YES. every time. and each time. I click on another link in the forum.. It comes right back up.(every page- I click on)..

How do I disable this.. Should I just let Spybot install it.. Is it a false positive??

thanks
helene