the Belgian team might be Roeselare
I believe it's Rooselare and i think i know what's the match in question. Some 3-4 years ago, in a closed betting forum (not public forum, but a forum where you can join oly if you're invited), a Serbian member came an hour before the kick off of an Intertoto Cup match and told us that he found out from the main referee of the match (Serbian referee) that Rooselare will lose by a big margin in Cyprus, from some complete outsider. The odds for home win were huge, i remember, and Rooselare were strong favorites. I don't remember the final score, but it was something like 5:1.
Later it was reported that shortly before kick off, huge amounts of money were put on a home win (the Cypriot team to win).
Later there was some investigation and i don't know what came out of it. I know that the Serbian referee was suspended (or even banned from football, i don't remember), but i think the clubs weren't punished back then.
Another true story..... Uefa Cup qualifying match between a Slovenian and Macedonian team. The Macedonians went to Slovenia by bus (some 1000 km) and they stopped almost in every town and they were betting in every bookie on Over 6.5 goals.
The match ended 7:2 for the Slovenian team
I remember a big scandal back then and lots of media talk, but i don't know what happened in the end.