Recent security patches have broken a few things. Or rather closed up some holes at the expense of some apps or plugins.
The author of the plugin may not know about this so ask them.
Bob
friends i have windows xp sp3 on my desktop with windows media player 11. previously i have installed wmp dolby sorround II plugin & its working fine but today i noticed that it is not working after that i uninstalled it & re installed but it makes no effect on sound when i turn it on or off after this i have tried srs wow xt plugin but it is also not working ....
what could be the reason .,,, plz help friends

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic