And 2.5.1 is for WA3. You should probably use either 2.5 or 2.5.1, since they're (it's) the most up-to-date on built-in effects. If re-instsalling AVS doesn't work, re-install Winamp, then downgrade to Winamp 2.x (if you're using WA3), then sacrifice a goat (those llama wanabees) to Vishnu and pray for mercy, cos you're shit out of luck - unless you want to reinstall Windows...
"guilt is the cause of more disauders
than history's most obscene marorders" --E. E. Cummings