May not solve the problem, but at least this will give you settings to play with...
Loading a (Virtual Dub) Plugin
Once you've downloaded a plugin, select Effects -> More Video Effects -> Load / Unload VirtualDub Plugins from the main window or Load / Unload VirtualDub Plugins from the pull-down list of effects in the Video Effects dialog. Click Load File(s), browse to the .vdf plugin file, and click Open to add it to the list of plugins. Or select one or more plugins and click Unload File(s) to remove unwanted plugins from the list.
Using a Plugin Effect
Once a plugin has been loaded, it will appear in the pull-down list of effects in the Video Effects dialog. Select the plugin effect and click Add to apply it to a clip. Click Configure Plugin to change the parameters of the effect.
Of course, a clip can be split into segments, and different filter parameters applied to each.
See the link in a subsequent post.